Perhaps you should try some spelling variations:
thien chien » thien nhien
chien sang » chieu sang, chien thang, khien bang
thong cong » trong cong, tong cong, thong thong
quan van » luan van, quan va, quan luan
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thien chien sang - hanh ((hang va) or (quan van)) thong cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thien chien sang - hanh ((hang va) OR (quan van)) thong cong dan chan cau.
• Adding a wildcard symbol may retrieve word variants: thien chien sang - hanh ((hang va) or (quan van)) thong cong dan chan cau*.