Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
hieu manh » chieu xanh, hieu nganh, dieu hanh
hang cong » dang cong, hang nong, bang cong
doc hieu » toc thieu, hoc thieu, hoc hien
san tuan » van tuan, san luan, san quan
tuan tap » toan tap, tuan tai, tuyen tap
luat » luan, xuat

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 manh - hanh ((trinh luat) or (tinh chat)) ((nhung cong) OR (hang cong)) san tuan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - hanh ((trinh luat) OR (tinh chat)) ((nhung cong) OR (hang cong)) san tuan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu manh - hanh ((trinh luat) or (tinh chat)) ((nhung cong) OR (hang cong)) san tuan tap".
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - hanh ((trinh luat) or (tinh chat)) ((nhung cong) OR (hang cong)) san tuan tap*.