Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
truong dao » truong dai, truong cao
truong bo » truong cao
doc hieu » toc thieu, hoc thieu, hoc hien
hieu luc » hieu luat, hieu qua
dan toan » van toan, dan than, manh toan
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu luc - thanh ((truong dao) OR (truong bo)) nhung huong dan toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu luc - thanh ((truong dao) OR (truong bo)) nhung huong dan toan ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu luc - thanh ((truong dao) OR (truong bo)) nhung huong dan toan ban*.