Perhaps you should try some spelling variations:
sach tham » sach nha
goc khien » ngoc chien, hoc hien
tham ngu » pham ngu, thanh ngu, thuat ngu
sach han » sach danh, sach nang, sach dao
khien tu » dien tu
tu sach » thu sach, su sach, tu cach
tu viet » su viet, te viet, nu viet
te sach » toc sach
han ngu » nhat ngu

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

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