Perhaps you should try some spelling variations:
nganh cong » nhanh chong, thanh cong
cong thuoc » cong thuc, dong thuoc, long thuoc
hoc nganh » hoc nhanh
mach hoc » cach hoc, anh hoc, bac hoc
dich hoc » sinh hoc, hinh hoc, tinh hoc
thuoc la » thuoc ma, thuoc va, thuoc tai
nhan tai » hang tai, van tai, toan tai
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
la hoi » lai hoi, xa hoi, le hoi
hoi ca » hoi cua, hoi cac, hoi cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((mach hoc) or (dich hoc)) tap, nghien cuu mot hoc nganh cong thuoc la hoi ca nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((mach hoc) OR (dich hoc)) tap, nghien cuu mot hoc nganh cong thuoc la hoi ca nhan tai.
• Adding a wildcard symbol may retrieve word variants: thu ((mach hoc) or (dich hoc)) tap, nghien cuu mot hoc nganh cong thuoc la hoi ca nhan tai*.