Perhaps you should try some spelling variations:
han tai » hang tai, nhan tai, van tai
cau luc » cau truc, cau phuc
sach ty » sach tu, sach thu, xach tay
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
xang xa » lang xa, mang xa, ang xa
luc va » duc va, tuc va, loc va
va cau » van cau, va cac, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach ty) OR (sach y)) xang xa hoi. hieu va cau luc va ((han tai) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach ty) OR (sach y)) xang xa hoi. hieu va cau luc va ((han tai) OR (hanh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach ty) OR (sach y)) xang xa hoi. hieu va cau luc va ((han tai) or (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ty) OR (sach y)) xang xa hoi. hieu va cau luc va ((han tai) or (hanh vi)) cua tre*.