Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
ty nang » ky nang, ty hang, ly nang
va hanh » van hanh, va thanh, va danh
va cam » va cham, va cac, va cao
vi cua » vai cua, di cua
luc va » duc va, tuc va, loc va
ve cam » ve cham, ve cac, ve cai
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((ty nang) or (ty xang)) x hoi. hieu ((ve cam) or (va cam)) luc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ty nang) OR (ty xang)) x hoi. hieu ((ve cam) OR (va cam)) luc va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: toc sach ((ty nang) or (ty xang)) x hoi. hieu ((ve cam) or (va cam)) luc va hanh vi cua te*.