Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
van thanh » ban thanh, van tuan
thanh vi » hanh vi, thanh va, thanh ve
tham luc » than luc, tham nuoc, tham thuc
va triet » va thiet, va trien, ve triet
hieu va » lieu va
luc van » luoc van, luu van, duc van
tu sach » thu sach, su sach, te sach
x hoi » xa hoi, o hoi, x ho
vi va » vi van, vai va, vu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) or (tu sach)) ky nang x hoi. ((hieu va) OR (hieu qua)) tham luc van thanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (tu sach)) ky nang x hoi. ((hieu va) OR (hieu qua)) tham luc van thanh vi va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) or (tu sach)) ky nang x hoi. ((hieu va) OR (hieu qua)) tham luc van thanh vi va triet".
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) or (tu sach)) ky nang x hoi. ((hieu va) OR (hieu qua)) tham luc van thanh vi va triet*.