Perhaps you should try some spelling variations:
thanh thang » nhanh thang, thanh thanh, thanh hang
thien hach » thien thanh, hien hanh
thanh tung » thanh cong
cong thanh » dong thanh, cong trinh, cong tan
hieu cach » hieu cac, chieu sach, hieu ca
dang cong » dung cong
thang cac » thong cac, hang cac, thanh cac
tung va » trung va, tuong va, dung va
va dang » van dang, va nang, va 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 ((hieu cach) or (thien hach)) - thanh tung va dang cong thanh thang cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu cach) OR (thien hach)) - thanh tung va dang cong thanh thang cac.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cach) or (thien hach)) - thanh tung va dang cong thanh thang cac*.