Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
hanh dai » hanh tai, hanh dao, vanh dai
dang xay » dang van, van xay
cua tre » cua te, cuu tre, dua tren
va hanh » van hanh, va thanh, va danh
cac xuc » cam xuc, cac nuoc, chat xuc
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
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: ((te sach) or (toc sach)) ky dang xay hoi. hieu ve cac xuc va hanh dai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky dang xay hoi. hieu ve cac xuc va hanh dai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ky dang xay hoi. hieu ve cac xuc va hanh dai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ky dang xay hoi. hieu ve cac xuc va hanh dai ((cua tre) OR (cua triet))*.