Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
danh dai » danh dau, danh di, danh sai
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
van bac » van ban, van bao, dan bac
van hac » van hoc, van ha, van hai
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
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: hoc sach ty nang xa hoi. hieu ((van bac) or (van hac)) thuc va danh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ty nang xa hoi. hieu ((van bac) OR (van hac)) thuc va danh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach ty nang xa hoi. hieu ((van bac) or (van hac)) thuc va danh dai cua tre*.