Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
luat nong » luat cong, xuat nong, luan nong
luat bong » luat cong, luat trong, luan cong
cong hach » cong sach, cong thanh, cong khanh
hach toan » thanh toan, manh toan
hoc hieu » hoc thieu, hoc hien, doc hieu
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: ((hoc hieu) or (toc thieu)) manh - hanh trinh ((luat nong) OR (luat bong)) cong hach toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (toc thieu)) manh - hanh trinh ((luat nong) OR (luat bong)) cong hach toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) or (toc thieu)) manh - hanh trinh ((luat nong) OR (luat bong)) cong hach toan tap".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (toc thieu)) manh - hanh trinh ((luat nong) OR (luat bong)) cong hach toan tap*.