Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc
bong khoa » dong khoa, hong khoa, song khoa
phan dang » phan dau, phan cong, nhan dan
cach noi » hanh noi, anh noi, cau noi
hoc bong » hoc cong, hoc trong, hoc luong
khoa hoc » hoa hoc
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
va phan » van phan, va phat, va phap
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((cach thoi) or (cach noi)) dai, nghien cuu mot hoc bong khoa hoc xa hoi va phan dang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((cach thoi) OR (cach noi)) dai, nghien cuu mot hoc bong khoa hoc xa hoi va phan dang.
• Adding a wildcard symbol may retrieve word variants: te ((cach thoi) or (cach noi)) dai, nghien cuu mot hoc bong khoa hoc xa hoi va phan dang*.