Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
sach va » sach xa, sach ha, sach dao
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
va nang » van nang, da nang, cam nang
tuc va » thuc va, truc va, tuc xa

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 va nang xa hoi. ((hieu ve) or (hieu va)) cam tuc va hanh va ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach va nang xa hoi. ((hieu ve) OR (hieu va)) cam tuc va hanh va ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach va nang xa hoi. ((hieu ve) or (hieu va)) cam tuc va hanh va ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach va nang xa hoi. ((hieu ve) or (hieu va)) cam tuc va hanh va ((cua triet) OR (su triet))*.