Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong thanh » dong thanh, cong trinh, truong thanh
tieu lang » hieu lang, tien lang, tieu dung
trung cua » truong cua, trung tuan, trung cap
hoc tieu » hoc thieu, hoc dieu, hoc sieu
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong ty
tran tap » tran tan, tran tuan, trang tai
toan tap » toan ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc tieu lang - thanh trung cua dung ((cong tan) or (cong thanh)) ((tran tap) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tieu lang - thanh trung cua dung ((cong tan) OR (cong thanh)) ((tran tap) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc tieu lang - thanh trung cua dung ((cong tan) or (cong thanh)) ((tran tap) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc tieu lang - thanh trung cua dung ((cong tan) or (cong thanh)) ((tran tap) OR (toan tap))*.