Perhaps you should try some spelling variations:
thanh thang » nhanh thang, thanh thanh, thanh hang
thieu tach » chiet tach, chieu sach, hieu cach
thien hach » thien thanh, hien hanh
thanh tung » thanh cong
cong thanh » dong thanh, cong trinh, cong tan
lang cong » dang cong, bang cong, hang cong
thang cac » thong cac, hang cac, thanh cac
tung va » trung va, tuong va, dung va
va lang » va nang, hoa lang

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) or (thien hach)) - thanh tung va lang cong thanh thang cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tach) OR (thien hach)) - thanh tung va lang cong thanh thang cac.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tach) or (thien hach)) - thanh tung va lang cong thanh thang cac*.