Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
va sac » va suc, va san, va sap
ve cac » vien cac
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((va sac) or (va cac)) ky ((nang xa) or (lang van)) hoi. hieu ve cac nuoc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((va sac) OR (va cac)) ky ((nang xa) OR (lang van)) hoi. hieu ve cac nuoc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((va sac) or (va cac)) ky ((nang xa) or (lang van)) hoi. hieu ve cac nuoc va hanh vi cua tre*.