Perhaps you should try some spelling variations:
cong duong » cuong duong, cong dong, con duong
hieu tinh » chieu tinh, lieu tinh, hieu binh
kieu tinh » lieu tinh, trieu tinh, diep tinh
duong van » duong va, luong va, dang van
cong dan » cong san, cong tan, huong dan
dan cong » dang cong, van cong, dan dong
van tan » van tuan, van ban, van tai
tan tap » toan tap, han tap, tan tat

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) or (kieu tinh)) - thanh cong dan cong duong van tan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu tinh) OR (kieu tinh)) - thanh cong dan cong duong van tan tap*.