Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
nang xa » nang x, lang xa, nang ma
va cach » va cac
hanh de » hanh ve, hanh kem
cuu tre » cua tre, cau tren, cau treo
cua te » cua tu

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 (doc sach)) ky nang xa hoi. lieu va cach thuc dan hanh de ((cuu tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) ky nang xa hoi. lieu va cach thuc dan hanh de ((cuu tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (doc sach)) ky nang xa hoi. lieu va cach thuc dan hanh de ((cuu tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (doc sach)) ky nang xa hoi. lieu va cach thuc dan hanh de ((cuu tre) or (cua te))*.