Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuoc sinh
thuat sach » thuat lanh, thuat san
va thanh » gia thanh, ban thanh, va tinh
nang xa » nang x, lang xa, nang ma
nam tuc » nam thuc, nam truc, nam tu
va nam » van nam, ha nam, va nay
tuc va » thuc va, truc va, tuc xa
de va » de van, te va, le va
ke va » te va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (thuat sach)) ky nang xa hoi. lieu va nam tuc va thanh ((de va) OR (ke va)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (thuat sach)) ky nang xa hoi. lieu va nam tuc va thanh ((de va) OR (ke va)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (thuat sach)) ky nang xa hoi. lieu va nam tuc va thanh ((de va) OR (ke va)) triet".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (thuat sach)) ky nang xa hoi. lieu va nam tuc va thanh ((de va) OR (ke va)) triet*.