Perhaps you should try some spelling variations:
trung phat » truong phat, trong phat, trung phan
nhung cong » dung cong, thong cong, hang cong
trung cap » truong cao, trung tam
tan thanh » tran thanh, tang thanh, toan thanh
thanh tap » thanh lap, thanh tai, thanh tay
doc hieu » toc thieu, hoc thieu
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: ((doc hieu) OR (hoc hien)) quang - thanh ((trung phat) or (trung cap)) nhung cong tan thanh tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) quang - thanh ((trung phat) OR (trung cap)) nhung cong tan thanh tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (hoc hien)) quang - thanh ((trung phat) or (trung cap)) nhung cong tan thanh tap".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (hoc hien)) quang - thanh ((trung phat) or (trung cap)) nhung cong tan thanh tap*.