Perhaps you should try some spelling variations:
danh dinh » dang dinh, danh vinh, dinh dinh
dau luan » dan luan, dat luan, khau luan
anh dinh » hanh dinh, lanh dinh, anh kinh
thu sai » thu hai, thu tai, thu san
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » hieu qua
cuu tre » cua tre, cau tren, cau treo
sai ky » sac ky

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