Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
su tien » su kien, su hien, tu tieng
y nang » ky nang, ly nang, v 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 y nang xa hoi. ((lieu va) or (hieu va)) cam tuc va hanh va su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y nang xa hoi. ((lieu va) OR (hieu va)) cam tuc va hanh va su tien.
• Adding a wildcard symbol may retrieve word variants: thuoc sach y nang xa hoi. ((lieu va) or (hieu va)) cam tuc va hanh va su tien*.