Perhaps you should try some spelling variations:
nghien cuc » nghien cuu, nghiep cuoc, nghiep cua
thanh van » thanh san, thanh toan, thanh phan
sach hoc » cach hoc, sach hoi, sach duoc
mach hoc » cach hoc, dich hoc, anh hoc
soc toan » so toan, soc trang, ngoc toan
khoa hoc » hoa hoc
va thanh » gia thanh, ban thanh, va tinh
cuc lon » cuu long, duc long
lon soc » long soc, lon suc, lon cuoc
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach hoc) or (mach hoc)) tap, nghien cuc lon soc toan khoa hoc xa hoi va thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach hoc) OR (mach hoc)) tap, nghien cuc lon soc toan khoa hoc xa hoi va thanh van.
• Adding a wildcard symbol may retrieve word variants: thu ((sach hoc) or (mach hoc)) tap, nghien cuc lon soc toan khoa hoc xa hoi va thanh van*.