Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
tieu sang » tieu dung, tiem nang, tinh sang
trung qua » trung quan, trong qua, trung cua
qua trong » quan trong, qua trinh, qua song
dong luc » nang luc
cong ba » cong bao, cong ha, cong va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu sang) OR (chieu sang)) - thanh trung qua trong ((cong ba) OR (dong luc)) thanh san~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu sang) OR (chieu sang)) - thanh trung qua trong ((cong ba) or (dong luc)) thanh san~".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu sang) OR (chieu sang)) - thanh trung qua trong ((cong ba) or (dong luc)) thanh san*.