Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
hoc phanh » hoc nhanh, hoc thanh, hoc hanh
khong hoc » khung hoc, thong hoc, khong thuoc
dan thanh » dang thanh, danh thanh, ban thanh
hoc phan » hoc dan, hoc pho
anh hoc » sinh hoc, benh hoc, hinh hoc
cuu mot » cua mot, cuu mo, huu mot
hoi dan » hoa dan, hoc dan, hoi dap
tu anh » tu hanh, tu manh, thu anh
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 anh hoc tap, nghien cuu mot ((hoc phan) or (hoc phanh)) khong hoc ma hoi dan thanh phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu anh hoc tap, nghien cuu mot ((hoc phan) OR (hoc phanh)) khong hoc ma hoi dan thanh phan.
• Adding a wildcard symbol may retrieve word variants: tu anh hoc tap, nghien cuu mot ((hoc phan) or (hoc phanh)) khong hoc ma hoi dan thanh phan*.