Perhaps you should try some spelling variations:
thanh hang » thanh hoang, thanh thang, tranh hang
tong cong » trong cong, cong cong, dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban
so lieu » so dieu
va tong » va thong, va tuong, va trong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so lieu) or (doc hieu)) tinh - thanh hang va tong cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so lieu) OR (doc hieu)) tinh - thanh hang va tong cong tan toan ban*.