Perhaps you should try some spelling variations:
hoc ngan » hoc nganh, boc ngan, hoc nga
hang hoa » hang khoa, thanh hoa, hang va
dan phan » doan phan, dan chan, van phan
tu mach » tu manh, tu hach, tu sach
tu cach » tu cac
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoi dan » hoa dan, hoc dan, hoi dap

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) or (tu cach)) hoc tap, nghien cuu mon hoc ngan hang hoa xa hoi dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu mach) OR (tu cach)) hoc tap, nghien cuu mon hoc ngan hang hoa xa hoi dan phan tu.
• Adding a wildcard symbol may retrieve word variants: ((tu mach) or (tu cach)) hoc tap, nghien cuu mon hoc ngan hang hoa xa hoi dan phan tu*.