Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
cong thanh » dong thanh, cong trinh, cong tan
hoc thieu » hoc hien
thong tu » phong tuc, thong tin, thong ke
cong san » cong tac
toan cao » toan ban, toan tap
tu dung » tuc dung, tu duong, su dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (toc thieu)) xanh - thanh thong tu dung ((cong thanh) or (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) xanh - thanh thong tu dung ((cong thanh) OR (cong san)) toan cao.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) xanh - thanh thong tu dung ((cong thanh) or (cong san)) toan cao*.