Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
nam luoc » nam duoc, nam buoc, nam quoc
luoc ban » luoc can, quoc ban, buoc ban
va triet » va thiet, va trien, ve triet
cao hoc » co hoc, cho hoc, chat hoc
thi van » thi lan, thi hanh, thi nang
te sac » te sach, te cac
te san » te ban, ke san, tu san
vai va » mai va, dai va, hai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) OR (te san)) ky nang cao hoc. ((thien van) or (thi van)) nam luoc ban thanh vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te san)) ky nang cao hoc. ((thien van) OR (thi van)) nam luoc ban thanh vai va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) OR (te san)) ky nang cao hoc. ((thien van) or (thi van)) nam luoc ban thanh vai va triet".
• Adding a wildcard symbol may retrieve word variants: ((te sac) OR (te san)) ky nang cao hoc. ((thien van) or (thi van)) nam luoc ban thanh vai va triet*.