Perhaps you should try some spelling variations:
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
dan dai » dat dai, dan dat, dan da
cua tre » cua te, cuu tre, cua triet
te cac » tu cac, ve cac, te cao
va am » va lam, va cam

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

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