Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thien van » thi van
toc sach » hoc sach, doc sach, nuoc sach
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
cam tu » cam thu, nam tu, dam tu
dao vi » dao voi, dao ve, dao li
dao va » dao van, tao va, do va
tu ca » tu cac, tu cua, tu can

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) or (thuoc sach)) y nang xa hoi. thien van cam tu ca ((dao vi) OR (dao va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuoc sach)) y nang xa hoi. thien van cam tu ca ((dao vi) OR (dao va)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (thuoc sach)) y nang xa hoi. thien van cam tu ca ((dao vi) OR (dao va)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (thuoc sach)) y nang xa hoi. thien van cam tu ca ((dao vi) OR (dao va)) cuu tre*.