Perhaps you should try some spelling variations:
dinh cau » dinh chau, dinh cuu, dinh cu
thuc dan » thuc hanh, hoc dan, thuc vat
toc sach » hoc sach, doc sach, thuoc sach
thi van » thi lan, thi hanh, thi nang
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc day
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cau cua » cau qua, ca cua, cu cua
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky lang xa hoi. ((thien van) or (thi van)) nham ((thuc va) or (thuc dan)) dinh cau cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky lang xa hoi. ((thien van) OR (thi van)) nham ((thuc va) OR (thuc dan)) dinh cau cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ky lang xa hoi. ((thien van) or (thi van)) nham ((thuc va) or (thuc dan)) dinh cau cua tre*.