Perhaps you should try some spelling variations:
te sach » toc sach
tai cua » thai cua, tai cuc, tri cua
va nang » van nang, da nang, cam nang
va hang » van hang, va lang, va hanh
dao suc » dao duc, dao tuc, cao suc
ky dang » ky nang, ky danh
ky tang » ky nang, kho tang, ky trong
cua tre » cua te, cuu tre, cua triet
va dao » ca dao

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 ((ky tang) or (ky dang)) xa hoi. lieu va dao suc ((va hang) OR (va nang)) tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky tang) OR (ky dang)) xa hoi. lieu va dao suc ((va hang) OR (va nang)) tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky tang) or (ky dang)) xa hoi. lieu va dao suc ((va hang) OR (va nang)) tai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky tang) or (ky dang)) xa hoi. lieu va dao suc ((va hang) OR (va nang)) tai cua tre*.