Perhaps you should try some spelling variations:
"te sach han ngu - ngoc chien so viet" » "te sach han ngu - cuoc chien so viet", "te sach han ngu - ngoc lien so viet", "te sach danh ngu - ngoc chien so viet", "te sach nang ngu - ngoc chien so viet", "te sach dao ngu - ngoc chien so viet", "te sach han ngu - ngoc chien si viet", "te sach han ngu - ngoc khien so viet", "te sach han ngu - ngoc bien so viet", "toc sach han ngu - ngoc chien so viet", "te sach nhat ngu - ngoc chien so viet", "te sach han ngu - ngoc chien hoc viet"
"thu sach tham ngu - goc nhin ngu viet" » "thu sach nha ngu - goc nhin ngu viet", "tu sach tham ngu - goc nhin ngu viet", "thuat sach tham ngu - goc nhin ngu viet", "thuoc sach tham ngu - goc nhin ngu viet", "thu sach pham ngu - goc nhin ngu viet", "thu sach thanh ngu - goc nhin ngu viet", "thu sach thuat ngu - goc nhin ngu viet", "thu sach tham ngu - goc nhan ngu viet", "thu sach tham ngu - goc nhanh ngu viet", "thu sach tham ngu - goc nhin ngon viet", "thu sach tham ngu - goc nhin nguoi viet", "thu sach tham ngu - goc nhin su viet"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("te sach han ngu - ngoc chien so viet") or ("thu sach tham ngu - goc nhin ngu viet"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("te sach han ngu - ngoc chien so viet") OR ("thu sach tham ngu - goc nhin ngu viet")).
• Removing quotes may allow a broader search: (( te sach han ngu - ngoc chien so viet ) or ( thu sach tham ngu - goc nhin ngu viet )).
• Adding a wildcard symbol may retrieve word variants: (("te sach han ngu - ngoc chien so viet") or ("thu sach tham ngu - goc nhin ngu viet"))*.