Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh trinh » canh tranh, hanh chinh
va truong » van truong, xa truong, va thuong
cuong tap » luong tap, cong tac, luong tai
va thong » va thuong, va phuong, he thong
tap toan » tap doan, tap quan, bai toan
toan cau » 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: toc thieu sang - hanh trinh ((va truong) or (va thong)) cuong tap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sang - hanh trinh ((va truong) OR (va thong)) cuong tap toan cau.
• Adding a wildcard symbol may retrieve word variants: toc thieu sang - hanh trinh ((va truong) or (va thong)) cuong tap toan cau*.