Perhaps you should try some spelling variations:
hanh manh » hanh mang, hoang manh, thanh minh
lanh manh » lanh tranh, lan anh, van manh
tong cong » trong cong, cong cong, dung cong
hoc hieu » hoc thieu, doc hieu, hoc dieu
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban
va tong » va thong, va tuong, va trong

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