Perhaps you should try some spelling variations:
dau luan » dan luan, dat luan, khau luan
thu sai » thu hai, thu tai, thu ai
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
luan va » luan van, luat va
cua tre » cua te, cuu tre, cua triet
thu san » thuy san, thu ban, phu san
hieu ve » hieu va, hieu van
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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) OR (thu san)) ky nang x hoi. ((hieu ve) or (lieu va)) dau luan va danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sai) OR (thu san)) ky nang x hoi. ((hieu ve) OR (lieu va)) dau luan va danh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sai) OR (thu san)) ky nang x hoi. ((hieu ve) or (lieu va)) dau luan va danh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sai) OR (thu san)) ky nang x hoi. ((hieu ve) or (lieu va)) dau luan va danh vi cua tre*.