Perhaps you should try some spelling variations:
hoc nhanh » hoc nganh, hoc phan
chong hoc » chong doc, thong hoc, thuong hoc
chung hoc » trung hoc, dung hoc, hung hoa
dich hoc » sinh hoc, hinh hoc, tinh hoc
hoi benh » hoc benh, hoa benh, hoi binh
nhan tai » hang tai, van tai, toan tai
tu dich » te dich, chu dich, hut dich
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
mai hoi » mai khoi, dai hoi, lai hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu dich hoc tap, nghien cuu mon hoc nhanh ((chong hoc) or (chung hoc)) mai hoi benh nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dich hoc tap, nghien cuu mon hoc nhanh ((chong hoc) OR (chung hoc)) mai hoi benh nhan tai.
• Adding a wildcard symbol may retrieve word variants: tu dich hoc tap, nghien cuu mon hoc nhanh ((chong hoc) or (chung hoc)) mai hoi benh nhan tai*.