Perhaps you should try some spelling variations:
"thu hoach san va giai trong cong trinh" » "thu hoach san va gian trong cong trinh", "thu hoach san va gia trong cong trinh", "thu hoach san va gioi trong cong trinh", "thu hoach sau va giai trong cong trinh", "thu hoach toan va giai trong cong trinh", "thu hoach bang va giai trong cong trinh", "thu hoach san van giai trong cong trinh", "thu hoach ban va giai trong cong trinh", "thu hoach dan va giai trong cong trinh"
"te sach ha me gioi van thong tin" » "te sach ha me gioi van thuong tin", "te sach ha me gioi van phong tin", "te sach ha me gioi va thong tin", "toc sach ha me gioi van thong tin", "te sach nha me gioi van thong tin", "te sach han me gioi van thong tin", "te sach xa me gioi van thong tin", "te sach ha me giai van thong tin", "te sach ha ve gioi van thong tin", "te sach ha me nguoi van thong tin", "te sach cha me gioi van thong tin", "te sach ba me gioi van thong tin", "te sach ha le gioi van thong tin"

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 ha me gioi van thong tin") or ("thu hoach san va giai trong cong trinh"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("te sach ha me gioi van thong tin") OR ("thu hoach san va giai trong cong trinh")).
• Removing quotes may allow a broader search: (( te sach ha me gioi van thong tin ) or ( thu hoach san va giai trong cong trinh )).
• Adding a wildcard symbol may retrieve word variants: (("te sach ha me gioi van thong tin") or ("thu hoach san va giai trong cong trinh"))*.