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
manh toan » thanh toan, anh tuan, tinh toan
trang va » tran van, hang va
quan van » luan van, quan va, quan luan
dan toan » van toan, dan than, xuan toan

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 ((trang va) or (quan van)) thong cong ((dan toan) or (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thien chien sang - hanh ((trang va) OR (quan van)) thong cong ((dan toan) OR (manh toan)) cau.
• Adding a wildcard symbol may retrieve word variants: thien chien sang - hanh ((trang va) or (quan van)) thong cong ((dan toan) or (manh toan)) cau*.