Perhaps you should try some spelling variations:
trong chuan » thong chuan, trong thuan, trong chuong
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
trong chan » trong cham, trong can, trong nhan
dung cong » dung trong
tan thanh » tran thanh, tang thanh, toan thanh
thanh van » thanh san, thanh toan, thanh phan
cong tan » cong tac, cong san, cong thanh

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 sach) or (chieu sang)) - thanh ((trong chan) OR (trong chuan)) dung cong tan thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu sang)) - thanh ((trong chan) OR (trong chuan)) dung cong tan thanh van.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chieu sang)) - thanh ((trong chan) OR (trong chuan)) dung cong tan thanh van".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu sang)) - thanh ((trong chan) OR (trong chuan)) dung cong tan thanh van*.