Perhaps you should try some spelling variations:
thu sac » thu sach, thu san, thu xac
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
danh vi » hanh vi, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
luc va » duc va, tuc va
loc va » hoc va
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: thu sac ky nang xa hoi. ((hieu va) or (lieu va)) cac ((luc va) or (loc va)) danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang xa hoi. ((hieu va) OR (lieu va)) cac ((luc va) OR (loc va)) danh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang xa hoi. ((hieu va) or (lieu va)) cac ((luc va) or (loc va)) danh vi cua tre*.