Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ty nang » ty xang, ty hang, ly nang
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
hanh de » hanh ve
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
ma hoi » mai hoi, xa hoi, ma hoa
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) OR (ky nang)) ma hoi. hieu ve 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) OR (ky nang)) ma hoi. hieu ve cac tuc va ((hanh de) or (hanh kem)) cua cu~".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) OR (ky nang)) ma hoi. hieu ve cac tuc va ((hanh de) or (hanh kem)) cua cu*.