Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
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, hoc hien, doc hieu
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.

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