Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
toc sach » hoc sach, doc sach, thuoc sach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
va nham » va cham, va tham, va nha
thuc va » thuc dan, thuc day
vai cua » dai cua, hai cua, lai cua
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: ((su sach) or (toc sach)) ky nang xa hoi. lieu va nham ((thuc va) OR (thuc vat)) thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (toc sach)) ky nang xa hoi. lieu va nham ((thuc va) OR (thuc vat)) thanh vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (toc sach)) ky nang xa hoi. lieu va nham ((thuc va) OR (thuc vat)) thanh vai cua tre*".