Perhaps you should try some spelling variations:
hanh mang » nhanh mang, hanh trang, nhanh lang
dung cong » dung trong
theo cuu » theo chu, khao cuu, thao cua
anh tang » anh bang, anh dang, anh nang
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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 cuu tinh - ((anh tang) or (hanh mang)) xay dung cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo cuu tinh - ((anh tang) OR (hanh mang)) xay dung cong tan toan cao.
• Adding a wildcard symbol may retrieve word variants: theo cuu tinh - ((anh tang) or (hanh mang)) xay dung cong tan toan cao*.