Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
thu sai » thu hai, thu tai, thu san
nang xa » nang x, lang xa, nang ma
luan va » luat va
danh vi » hanh vi, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
sai ky » sac ky
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 sai ky nang xa hoi. ((hieu van) or (lieu va)) dau ((luan va) OR (luan van)) danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sai ky nang xa hoi. ((hieu van) OR (lieu va)) dau ((luan va) OR (luan van)) danh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sai ky nang xa hoi. ((hieu van) or (lieu va)) dau ((luan va) OR (luan van)) danh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sai ky nang xa hoi. ((hieu van) or (lieu va)) dau ((luan va) OR (luan van)) danh vi cua tre*.