Perhaps you should try some spelling variations:
danh mang » hanh mang, danh thang, doanh sang
toc sach » doc sach, thuoc sach, nuoc sach
hieu van » hieu va, thien van, lieu va
mang cua » manh cua, dung cua, ban cua
van cham » van chat, van tham, va cham
hoc sach » hoc sinh, hoc cac, hoc anh
nang xa » nang x, lang xa, nang ma
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, tuc xa, duc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (hoc sach)) ky nang xa hoi. hieu van cham ((tuc va) OR (truc va)) danh mang cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ky nang xa hoi. hieu van cham ((tuc va) OR (truc va)) danh mang cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (hoc sach)) ky nang xa hoi. hieu van cham ((tuc va) OR (truc va)) danh mang cua tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) ky nang xa hoi. hieu van cham ((tuc va) OR (truc va)) danh mang cua tre*.