Perhaps you should try some spelling variations:
trung thanh » truong thanh
tieu sang » chieu sang, tieu dung, tiem nang
dung cong » dung trong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
tran van » luan van
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sang - thanh ((tran van) or (trung thanh)) dung cong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sang - thanh ((tran van) OR (trung thanh)) dung cong manh toan cao.
• Adding a wildcard symbol may retrieve word variants: theo tieu sang - thanh ((tran van) or (trung thanh)) dung cong manh toan cao*.