Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
luc van » luoc van, luu van, duc van
xuc van » duc van, xuc ban, thuc van
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
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty ((nang xa) or (lang ha)) hoi. hieu vu cham ((xuc van) OR (luc van)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((nang xa) OR (lang ha)) hoi. hieu vu cham ((xuc van) OR (luc van)) hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty ((nang xa) or (lang ha)) hoi. hieu vu cham ((xuc van) OR (luc van)) hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: so sach ty ((nang xa) or (lang ha)) hoi. hieu vu cham ((xuc van) OR (luc van)) hanh vi cuu tre*.