Perhaps you should try some spelling variations:
xuan nhung » quan nhung, xuan hung, xuan phuong
xuan chung » luan chung, xuat chung, xuan hung
hieu manh » chieu xanh, hieu nganh, dieu hanh
lieu tinh » trieu tinh, diep tinh, bien tinh
cuong tap » luong tap, cong tac, luong tai
tap toan » tap doan, tap quan, bai 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: hoc ((hieu manh) or (lieu tinh)) - canh tranh ((xuan nhung) OR (xuan chung)) cuong tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (lieu tinh)) - canh tranh ((xuan nhung) OR (xuan chung)) cuong tap toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (lieu tinh)) - canh tranh ((xuan nhung) OR (xuan chung)) cuong tap toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (lieu tinh)) - canh tranh ((xuan nhung) OR (xuan chung)) cuong tap toan ban*.