Perhaps you should try some spelling variations:
thieu tach » thien hach, chiet tach, chieu sach
hung thang » cang thang, hung tran
hoc thieu » toc thieu, hoc hien
van luong » van duong, van cuong, nang luong
va luong » va tuong, va huong, vi luong
cong san » cong tac
san than » sang than, san thanh, ban than
than cao » toan cao, thai cao, than cap

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 tach - hung thang ((va luong) OR (van luong)) cong san than cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tach - hung thang ((va luong) OR (van luong)) cong san than cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tach - hung thang ((va luong) OR (van luong)) cong san than cao*.