Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
mach hoc » cach hoc, dich hoc, anh hoc
cuu nang » chuc nang, cam nang, cuu van
nang hoc » nang doc, nang luc, dong hoc
hoc hang » hoc hanh, hoc bang, hoc tang
hang hoa » hang khoa, thanh hoa, hang va
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 nang hoc hang hoa hoc ma hoi va ((luan van) or (thanh van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien cuu nang hoc hang hoa hoc ma hoi va ((luan van) OR (thanh van)).
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu nang hoc hang hoa hoc ma hoi va ((luan van) or (thanh van))*.