Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
cac thuc » cach thuc, cac thu, can thuc
tu sach » su sach, te sach, tu cach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
thuc va » thuc vat, thuc dan, thuc day
dan tai » van tai, dan thi, han tai
cuu tre » cua tre, cau tren, cau treo
va dan » ca dan, va dao, va dau
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: ((tu sach) or (thu sach)) ky dang xa hoi. lieu va cac thuc va dan tai ((cuu tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky dang xa hoi. lieu va cac thuc va dan tai ((cuu tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky dang xa hoi. lieu va cac thuc va dan tai ((cuu tre) or (cua te))*.