Perhaps you should try some spelling variations:
thanh thang » nhanh thang, thanh thanh, thanh hang
thien hach » thien thanh, hien hanh
thanh dung » thanh duong, thanh tung, thanh hung
cong thanh » dong thanh, cong trinh, cong tan
nang cong » nang song, dang cong, bang cong
thang cac » thong cac, hang cac, thanh cac
dung van » duong van, dung va, dang van
van nang » van quang, van ban, van dong
hieu ca » hieu cac, hieu cua, hieu va

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 ca) or (thien hach)) - thanh dung van nang cong thanh thang cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu ca) OR (thien hach)) - thanh dung van nang cong thanh thang cac.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu ca) or (thien hach)) - thanh dung van nang cong thanh thang cac*.