Perhaps you should try some spelling variations:
thu canh » thuc hanh, thu cong, thu ban
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 thi » anh tho, dinh thi, dang thi
thi cua » thai cua, thi cuc, tri cua
cua tre » cua te, cuu tre, cua triet
tu bat » tu ban, tu dat
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 (thu canh)) ky nang o lai. hieu ve cac nuoc van anh thi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu bat) OR (thu canh)) ky nang o lai. hieu ve cac nuoc van anh thi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu bat) or (thu canh)) ky nang o lai. hieu ve cac nuoc van anh thi cua tre*.