Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
di cua » dai cua, doi cua, de cua
va cai » va cac, va bai, va dai
ve cai » ve cac, ve tai, ve cau
cua te » cua tu

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 xa hoi. hieu ((ve cai) or (va cai)) lao ((ban hanh) or (van hanh)) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang xa hoi. hieu ((ve cai) OR (va cai)) lao ((ban hanh) OR (van hanh)) di cua te.
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang xa hoi. hieu ((ve cai) or (va cai)) lao ((ban hanh) or (van hanh)) di cua te*.