Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
van nham » van nam, van nhan, van tham
cua tre » cua te, cua triet, dua tren
su sach » so sach, vu sach
thuc va » thuc vat, thuc dan, thuc day
nang xa » nang x, lang xa, nang ma
cuu tre » cau tren, cau treo

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. hieu van nham thuc va thanh vai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (toc sach)) ky nang xa hoi. hieu van nham thuc va thanh vai ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (toc sach)) ky nang xa hoi. hieu van nham thuc va thanh vai ((cua tre) OR (cuu tre))*".