Perhaps you should try some spelling variations:
tu cach » tu cac
va danh » va dinh, va hanh, dia danh
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
va dan » ca dan, va dao, va dau
hu cua » tu cua, vu cua
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (te sach)) ky nang o hai. hieu va cac xuc ((va danh) OR (va dan)) hu cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) ky nang o hai. hieu va cac xuc ((va danh) OR (va dan)) hu cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (te sach)) ky nang o hai. hieu va cac xuc ((va danh) OR (va dan)) hu cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky nang o hai. hieu va cac xuc ((va danh) OR (va dan)) hu cua tre*.