Perhaps you should try some spelling variations:
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
nuoc van » nuoc va, nuoc san, luoc van
hieu ve » hieu va, hieu van
van anh » van thanh, tuan anh, van minh
anh tri » anh thi, anh tai, thanh tri
cua tre » cua te, cuu tre, cua triet
tu bat » tu ban, tu dat
tu can » tu ban, tu cac, thu canh
nang o » nang co, nang ho, nang ro
ve cac » va cac, vien cac
o lai » o lao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu bat) or (tu can)) ky nang o lai. hieu ve cac nuoc van anh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu bat) OR (tu can)) ky nang o lai. hieu ve cac nuoc van anh tri cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu bat) or (tu can)) ky nang o lai. hieu ve cac nuoc van anh tri cua tre*.