Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
thuc day » thuc dan, thuc vat
nay thuc » nam thuc, cay thuc, day thuc
hoc sach » hoc sinh, hoc cac, hoc anh
cau treo » cau theo, cau tren, cau triet
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
day dan » day danh, dao dan, cay dan
dan vai » dan va, dan tai, dan vat
cuu tre » cua tre, cau tren
va nay » va ngay, va cay

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (hoc sach)) ky nang xa hoi. hieu va nay thuc day dan vai ((cuu tre) OR (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (hoc sach)) ky nang xa hoi. hieu va nay thuc day dan vai ((cuu tre) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (hoc sach)) ky nang xa hoi. hieu va nay thuc day dan vai ((cuu tre) OR (cau treo))".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (hoc sach)) ky nang xa hoi. hieu va nay thuc day dan vai ((cuu tre) OR (cau treo))*.