Perhaps you should try some spelling variations:
van thanh » ban thanh
van tuan » van quan, van ban, anh tuan
sach ty » sach tu, sach thu, xach tay
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
cua tre » cua te, cuu tre, cua triet
ca cua » co cua

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

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