Perhaps you should try some spelling variations:
cua tre » cua te, cuu tre, cua triet
va dinh » van dinh, va kinh, va tinh
va danh » va dan, va hanh, dia danh
cao luc » bao luc, cao duc, cao suc
nang o » nang co, nang ho, nang ro
va cao » va cac, va co, va dao
bai ky » ban ky, bac ky, dai ky
sai ky » sac ky
ca cua » co 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 ((bai ky) OR (sai ky)) nang o hai. lieu va cao luc ((va danh) or (va dinh)) ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((bai ky) OR (sai ky)) nang o hai. lieu va cao luc ((va danh) OR (va dinh)) ca cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((bai ky) OR (sai ky)) nang o hai. lieu va cao luc ((va danh) or (va dinh)) ca cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((bai ky) OR (sai ky)) nang o hai. lieu va cao luc ((va danh) or (va dinh)) ca cua tre*.