Perhaps you should try some spelling variations:
hoach hoc » hoach hoi, hoach hoa, hoa hoc
luong duc » duong duc, luong cuoc, luong dich
long soc » lon soc, luong suc, cong so
khoa hoc » hoa hoc
van luan » van quan, van tuan, von luan
hai van » thai van, ha van, hai tan
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu hoach hoc tap, nghien cuu ((long soc) or (luong duc)) toan khoa hoc xa hai van luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu hoach hoc tap, nghien cuu ((long soc) OR (luong duc)) toan khoa hoc xa hai van luan van.
• Adding a wildcard symbol may retrieve word variants: thu hoach hoc tap, nghien cuu ((long soc) or (luong duc)) toan khoa hoc xa hai van luan van*.