Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
hieu van » hieu va, thien van, lieu va
van chat » cao chat
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
xuc van » duc van, luc van, vuc van
xuc ban » duc ban, cuc ban, quoc ban
vai cua » dai cua, hai cua, lai cua
vi cua » di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach ty nang xa hoi. hieu van chat ((xuc van) or (xuc ban)) hanh ((vi cua) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ty nang xa hoi. hieu van chat ((xuc van) OR (xuc ban)) hanh ((vi cua) OR (vai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: doc sach ty nang xa hoi. hieu van chat ((xuc van) or (xuc ban)) hanh ((vi cua) or (vai cua)) tre*.