Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thieu sang » chieu sang, thieu khang, hieu lang
hanh dung » thanh dung, anh dung, hanh dong
luan tang » luan nang, lan tang, xuan trang
luan danh » luan thanh, luan van, luan nang
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang toan
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) OR (thieu quang)) - hanh dung ((luan tang) or (luan danh)) cong vang toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu sang) OR (thieu quang)) - hanh dung ((luan tang) OR (luan danh)) cong vang toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((thieu sang) OR (thieu quang)) - hanh dung ((luan tang) or (luan danh)) cong vang toan cao".
• Adding a wildcard symbol may retrieve word variants: toc ((thieu sang) OR (thieu quang)) - hanh dung ((luan tang) or (luan danh)) cong vang toan cao*.