Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
van quang » van quan, tran quang, van tuan
vat dung » van dung, viet dung, mat duong
van hanh » van thanh, ban hanh, van anh
va dung » van dung, va duong, va ung

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 - thanh trung ((vat dung) or (va dung)) cong ((van quang) or (van hanh)) cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh trung ((vat dung) OR (va dung)) cong ((van quang) OR (van hanh)) cu.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh trung ((vat dung) or (va dung)) cong ((van quang) or (van hanh)) cu*.