Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh trang » thanh trung, canh tranh, hanh trinh
thanh tran » thanh trang, thanh toan, thanh tra
hoc thieu » toc thieu, hoc hien
cong tinh » cong trinh, cong vinh, long tinh
ban cong » bang cong, van cong, phan cong
toan cau » toan cao, toan ban, toan tap
va ban » van ban, va bai, va bao

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 trang) or (thanh tran)) va ban cong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((hanh trang) OR (thanh tran)) va ban cong tinh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((hanh trang) or (thanh tran)) va ban cong tinh toan cau*.