Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
doi chieu » doc hieu, doi chi, mot chieu
cong danh » cuong danh, cong dan, cong thanh
danh toan » manh toan, anh toan, dan toan
ho chieu » theo chieu, hoc thieu, mot chieu
hoc tang » hoc bang, hoc tan, hoc tieng
toan ban » van ban
hoc han » hoc phan, hoc hanh, hoc chan

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 chieu) OR (doi chieu)) sang - hanh trung ((hoc han) OR (hoc tang)) cong danh toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) sang - hanh trung ((hoc han) or (hoc tang)) cong danh toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) sang - hanh trung ((hoc han) or (hoc tang)) cong danh toan ban*.