Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
thong cong » trong cong, tong cong, thong thong
chu quang » chat quang, vu quang
trung hoc » trung quoc
hoc thong » hoc thuong, hoc trong, hoc hong
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu quang) or (chieu sang)) - thanh trung hoc thong cong tan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu quang) OR (chieu sang)) - thanh trung hoc thong cong tan than cao.
• Adding a wildcard symbol may retrieve word variants: theo ((chu quang) or (chieu sang)) - thanh trung hoc thong cong tan than cao*.