Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh trang » thanh trung, canh tranh, hanh trinh
hoc thieu » toc thieu, hoc hien
va phuong » va thuong, cac phuong
thong dan » thong van, tuong dan, thong den
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
va cong » tai cong, cua 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 trang ((va cong) or (va phuong)) thong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh trang ((va cong) OR (va phuong)) thong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh trang ((va cong) or (va phuong)) thong dan toan cao*.