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

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 cac) OR (va cac)) tuc va ((hanh de) OR (hanh kem)) cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang xa hoi. hieu ((ve cac) OR (va cac)) tuc va ((hanh de) or (hanh kem)) cua tu~".
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang xa hoi. hieu ((ve cac) OR (va cac)) tuc va ((hanh de) or (hanh kem)) cua tu*.