Perhaps you should try some spelling variations:
phan khong » phan hong, nhan khong, pham khong
thanh phan » thanh pho, thanh san, thanh toan
khong hoc » khung hoc, thong hoc, khong thuoc
mach hoc » cach hoc, dich hoc, anh hoc
hoc phan » hoc pho
tu mach » tu cach, tu manh, tu hach
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
hoi dan » hoa dan, hoi dap, thoi dai

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 mot hoc phan khong hoc ma ((hoi dan) OR (hoc dan)) thanh phan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, nghien cuu mot hoc phan khong hoc ma ((hoi dan) OR (hoc dan)) thanh phan".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu mot hoc phan khong hoc ma ((hoi dan) OR (hoc dan)) thanh phan*.