Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cham thuc » nham thuc, pham thuc, tham thuc
thanh va » thanh van, hanh va, thanh ha
thanh vi » hanh vi, thanh ve, nhanh vi
thuc va » thuc vat, thuc dan, thuc day
tu cach » tu cac
va cham » va chat, va tham
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (thuoc sach)) ky nang xa hoi. lieu va cham thuc va ((thanh vi) OR (thanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thuoc sach)) ky nang xa hoi. lieu va cham thuc va ((thanh vi) OR (thanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (thuoc sach)) ky nang xa hoi. lieu va cham thuc va ((thanh vi) OR (thanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (thuoc sach)) ky nang xa hoi. lieu va cham thuc va ((thanh vi) OR (thanh va)) cua tre*.