Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
khanh va » khanh van, hanh va, thanh va
xa khanh » xa thanh, van khanh, dat khanh
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
nam tuc » nam thuc, nam truc, nam tu
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
ma hoi » mai hoi, ma hoa, me hoi
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang ((ma hoi) OR (xa hoi)). hieu va nam tuc xa khanh va ((cua tre) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((ma hoi) OR (xa hoi)). hieu va nam tuc xa khanh va ((cua tre) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((ma hoi) OR (xa hoi)). hieu va nam tuc xa khanh va ((cua tre) or (va triet))*".