Perhaps you should try some spelling variations:
thanh trung » thanh tung
khong cong » thong cong, khong cang, chong cong
hieu tinh » chieu tinh, lieu tinh, kieu tinh
trung cap » truong cao, trung tam
cap khong » cat khong, chap phong, va khong
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
chan cac » chon cac, thanh cac, cho cac
phan cac » phan dau, phan lap, phan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu tinh - thanh trung cap khong cong dan ((((chan cac) or (nhan cach))) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu tinh - thanh trung cap khong cong dan ((((chan cac) OR (nhan cach))) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - thanh trung cap khong cong dan ((((chan cac) or (nhan cach))) or (phan cac))*.