Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
toc sach » hoc sach, doc sach, nuoc sach
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
van cam » van nam, van lam, van cau
hanh va » hanh vi
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc 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 (thuoc sach)) ky dang xay hoi. hieu van cam xuc va ((hanh va) OR (hang va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuoc sach)) ky dang xay hoi. hieu van cam xuc va ((hanh va) OR (hang va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (thuoc sach)) ky dang xay hoi. hieu van cam xuc va ((hanh va) OR (hang va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (thuoc sach)) ky dang xay hoi. hieu van cam xuc va ((hanh va) OR (hang va)) cua tre*.