Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hanh tang » hanh trang, hanh tung, nhanh thang
hanh mang » nhanh mang, hanh trang, nhanh lang
dung cong » dung trong
anh tang » anh bang, anh dang, anh nang
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 - ((((hanh tang) or (hanh mang))) or (anh tang)) xay dung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((((hanh tang) OR (hanh mang))) OR (anh tang)) xay dung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((((hanh tang) or (hanh mang))) or (anh tang)) xay dung cong tac toan cau*.