Perhaps you should try some spelling variations:
hoc thien » hoc hien, hoc thieu, hoc tien
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tranh van » tran van, trinh van, thanh van
van nhung » van nhuong, va nhung, van hung
cong manh » duong manh, cong thanh, hoang manh
cong danh » cuong danh, cong dan, cong thanh
toan tap » toan ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thien) OR (hoc thiet)) nga - canh tranh van nhung ((cong manh) OR (cong danh)) toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thien) or (hoc thiet)) nga - canh tranh van nhung ((cong manh) OR (cong danh)) toan tap~".
• Adding a wildcard symbol may retrieve word variants: ((hoc thien) or (hoc thiet)) nga - canh tranh van nhung ((cong manh) OR (cong danh)) toan tap*.