Perhaps you should try some spelling variations:
thieu thanh » thien thanh, thi thanh, thu thanh
thanh trung » thanh tung
hoc thieu » toc thieu, hoc hien
cong tac » cong ty
va baog » va bang
tac tan » tac can, tac van, tat tan
tan cao » toan cao, tao cao, tay cao
va bao » va bai

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 thanh - thanh trung ((va baog) or (va bao)) cong tac tan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu thanh - thanh trung ((va baog) OR (va bao)) cong tac tan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu thanh - thanh trung ((va baog) or (va bao)) cong tac tan cao*.