Perhaps you should try some spelling variations:
tran thanh » ban thanh, van thanh, quan thanh
nhung cong » dung cong, thong cong, hang cong
hieu cach » hieu cac, chieu sach, hieu ca
trung cua » truong cua, trung tuan, trung cap
hoc hieu » hoc thieu, hoc hien, doc hieu
cong dan » cong san, cong tan, huong dan
cac cap » cao cap, cac cam, cac cau
ca cao » ca dao, cu cao, ca cac

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 - thanh ((trung cua) or (tran thanh)) nhung cong dan ((ca cao) or (cac cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - thanh ((trung cua) OR (tran thanh)) nhung cong dan ((ca cao) OR (cac cap)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - thanh ((trung cua) or (tran thanh)) nhung cong dan ((ca cao) or (cac cap))*.