Perhaps you should try some spelling variations:
truong thanh » truong trung, truong thpt, truong chung
thanh trung » thanh tung
trung tuan » trung thanh, trung tam, tran tuan
tuan thong » toan thong, tran thong, tuan phong
hieu cach » hieu cac, chieu sach, hieu ca
hoc hieu » hoc thieu, hoc hien, doc hieu
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tap
than cap » khan cap, thanh lap, thanh 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 tuan thong ((cong tan) or (truong thanh)) ((toan cau) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - thanh trung tuan thong ((cong tan) OR (truong thanh)) ((toan cau) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - thanh trung tuan thong ((cong tan) or (truong thanh)) ((toan cau) or (than cap))*.