Perhaps you should try some spelling variations:
phan thong » phan thuong, phan hong, phan tong
cach thoi » cac thoi, cach thuc, cach noi
thong hoc » thuong hoc, tuong hoc, thong hoa
van phong » van dong, hai phong
thoi tap » toi tap, hoc tap, thoi dai
hoc phan » hoc dan, hoc pho
phong tu » phong tuc, thong tu, phong thuy
tu cach » tu cac
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
ma hai » va hai, xa hai, manh hai
ta hai » tai hai, tac hai, tra hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach thoi tap, nghien cuu mon hoc phan thong hoc ((ma hai) or (ta hai)) van phong tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thoi tap, nghien cuu mon hoc phan thong hoc ((ma hai) OR (ta hai)) van phong tu.
• Adding a wildcard symbol may retrieve word variants: tu cach thoi tap, nghien cuu mon hoc phan thong hoc ((ma hai) or (ta hai)) van phong tu*.