Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
lieu tinh » trieu tinh, diep tinh
bien tinh » bi tinh, yen tinh, diep tinh
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
cong san » cong tac
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: hoc ((lieu tinh) OR (bien tinh)) - hanh tranh cua thong ((huong dan) or (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((lieu tinh) OR (bien tinh)) - hanh tranh cua thong ((huong dan) OR (cong san)) toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((lieu tinh) OR (bien tinh)) - hanh tranh cua thong ((huong dan) or (cong san)) toan ban*".