Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
dinh tai » dinh toai, dinh tri, dinh thi
van dinh » van minh, van dich, va dinh
tu sach » su sach, te sach, tu cach
vu kham » vu khanh
tai cua » thai cua, tai cuc, tri cua
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
vu cham » va cham, tu cham, qua cham
lang xa » lang ha, dang xay, lang van
y lang » o lang, _ lang, tay lang

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) OR (thu sach)) y lang xa hoi. hieu ((vu cham) or (vu kham)) xuc van dinh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y lang xa hoi. hieu ((vu cham) OR (vu kham)) xuc van dinh tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) y lang xa hoi. hieu ((vu cham) or (vu kham)) xuc van dinh tai cua tre*".