Perhaps you should try some spelling variations:
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
luu tre » luu tru, cuu tre, luy tre
te cac » ve cac, te cao, de cac
vi luu » vi lua

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

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