Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
nhieu tang » chieu sang, nhiet nang
cua truong » xuan truong, cac truong, xa truong
hieu lang » chieu sang, hieu quang, hieu van
cua trung » xuan trung, cua nhung, ba trung
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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: ho ((hieu lang) OR (nhieu tang)) - hanh trung ((cua trung) OR (cua truong)) cong tac toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (nhieu tang)) - hanh trung ((cua trung) or (cua truong)) cong tac toan cao~".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (nhieu tang)) - hanh trung ((cua trung) or (cua truong)) cong tac toan cao*.