Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach ty » sach y, sach tu, sach thu
hanh de » hanh ve
cac tuc » cac toc, cac tu, cac tac
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
tuc va » thuc va, truc va, tuc xa
cua cu » cua chu, cua cau, cua su

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

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