Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, cham soc
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
xuc van » duc van, luc van, xuc ban
vu cham » va cham, vu kham, tu cham
sach ty » sach y, sach tu, sach thu
hieu vu » hieu va, hieu ve, hieu su
lang ha » long ha
nang xa » nang x, lang xa, nang ma
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: su sach ty ((nang xa) or (lang ha)) hoi. hieu vu cham xuc van hanh ((vi cua) OR (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang xa) OR (lang ha)) hoi. hieu vu cham xuc van hanh ((vi cua) OR (vai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((nang xa) or (lang ha)) hoi. hieu vu cham xuc van hanh ((vi cua) OR (vai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang xa) or (lang ha)) hoi. hieu vu cham xuc van hanh ((vi cua) OR (vai cua)) tre*.