Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh trung » thanh tung
thieu tach » thien hach, chiet tach, chieu sach
cong thanh » dong thanh, cong trinh, cong tan
trung van » truong van, trong van, trung va
nang cong » nang song, dang cong, bang cong
thanh tho » thanh thao, thanh pho, thanh ho
van nang » van quang, van ban, van dong

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