Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
duc van » duc va, duc tan, duc manh
van anh » van thanh, tuan anh, van minh
ve cao » ve bao, ve cac, ve co
va cao » va co, va dao, va bao
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua
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: toc sach ty nang xa hoi. hieu ((ve cao) OR (((va cao) OR (va cac)))) duc van anh vi cua cu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang xa hoi. hieu ((ve cao) or (((va cao) OR (va cac)))) duc van anh vi cua cu~".
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang xa hoi. hieu ((ve cao) or (((va cao) OR (va cac)))) duc van anh vi cua cu*.