Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
hieu lang » chieu sang, hieu quang, nhieu tang
hoc tieng » hoc hien
danh toan » anh toan, dan toan, dang toan
manh toan » thanh toan, anh tuan, tinh toan
hoc hang » hoc hanh, hoc bang, hoc tang
ho hieu » ho chieu, hoi hieu, nho hieu

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