Perhaps you should try some spelling variations:
thanh duong » thanh huong, thanh cuong, thanh vuong
chieu sang » chieu sach, chieu xanh, hieu lang
thanh dung » thanh tung, thanh hung, hanh dung
nang cong » nang song, dang cong, bang cong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
tran tap » toan tap, tran tuan, trang tai
tran tan » tran tuan, tran van, tran thanh
va nang » van nang, da nang, cam nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sang - ((thanh dung) OR (thanh duong)) va nang cong tan ((tran tap) or (tran tan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - ((thanh dung) OR (thanh duong)) va nang cong tan ((tran tap) OR (tran tan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - ((thanh dung) OR (thanh duong)) va nang cong tan ((tran tap) or (tran tan))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - ((thanh dung) OR (thanh duong)) va nang cong tan ((tran tap) or (tran tan))*.