Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
nhung cong » dung cong, thong cong, hang cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
trung va » truong va, trang va, trung ha
tran van » luan van
toan tap » toan ban

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

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