Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
thong hoc » thuong hoc, thong hoa, thong hoi
tuong hoc » truong hoc, tuong ho, duong hoc
dan thanh » dang thanh, danh thanh, ban thanh
mach hoc » cach hoc, dich hoc, anh hoc
hoc phan » hoc dan, 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, hoc dan, hoi dap
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 mot hoc phan ((thong hoc) OR (tuong hoc)) ma hoi 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 ((thong hoc) OR (tuong hoc)) ma hoi dan thanh phan".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu mot hoc phan ((thong hoc) OR (tuong hoc)) ma hoi dan thanh phan*.