Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
dinh trong » sinh trong, chinh trong, dinh thuong
van nhung » van nhuong, va nhung, van phung
van hung » van dung, manh hung, van duong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) OR (chiet tach)) - dinh trong ((van nhung) or (van hung)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - dinh trong ((van nhung) OR (van hung)) cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chiet tach)) - dinh trong ((van nhung) or (van hung)) cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chiet tach)) - dinh trong ((van nhung) or (van hung)) cong tac toan cau*.