Perhaps you should try some spelling variations:
luong thuc » thuong thuc, phuong thuc, luong thi
cuu luong » cuu long, cu luong, cuu tuong
van thanh » ban thanh, van tuan
mach hoc » cach hoc, dich hoc, anh hoc
hanh hoa » thanh hoa, khanh hoa, hang hoa
van phan » van phong, luan phan, van ban
tu mach » tu cach, tu manh, tu hach
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu mach hoc tap, nghien cuu luong thuc hanh hoa hoc ma hoi ((van phan) or (van thanh)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien cuu luong thuc hanh hoa hoc ma hoi ((van phan) OR (van thanh)) van.
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu luong thuc hanh hoa hoc ma hoi ((van phan) or (van thanh)) van*.