Perhaps you should try some spelling variations:
trinh toan » tinh toan, trinh han, trinh quan
thieu sang » chieu sang, thieu khang, thieu quang
thanh toan » thanh hoa, thanh san, tinh toan
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
tang cua » mang cua, hang cua, tang luan
ban cong » bang cong, van cong, phan cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sang - hanh tang cua ban cong ((trinh toan) or (thanh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh tang cua ban cong ((trinh toan) OR (thanh toan)) cau*.