Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
theo bien » thieu bien, theo tieu, che bien
bien tinh » bi tinh, yen tinh, diep tinh
hanh dung » thanh dung, anh dung, manh dung
hanh dong » anh dong, ha dong
hang cong » dang cong, hang nong, bang cong
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo bien tinh - ((hanh dung) or (hanh dong)) cua ((nhung cong) OR (hang cong)) dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo bien tinh - ((hanh dung) OR (hanh dong)) cua ((nhung cong) OR (hang cong)) dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo bien tinh - ((hanh dung) or (hanh dong)) cua ((nhung cong) OR (hang cong)) dan toan tap".
• Adding a wildcard symbol may retrieve word variants: theo bien tinh - ((hanh dung) or (hanh dong)) cua ((nhung cong) OR (hang cong)) dan toan tap*.