Perhaps you should try some spelling variations:
khang thuoc » khong thuoc, dang thuoc, hanh thuoc
nganh khang » nganh khong, ngan hang, nhanh thang
hoc nganh » hoc nhanh
thoi tap » toi tap, thoi dai, hoi tai
cuu toan » cuu hoan, cua toan, huu toan
toan hoc » toan khoa, van hoc, hoa hoc
thuoc xa » thuoc ma, thuoc va, thuoc la
van nhan » van phan, van thanh, danh nhan
tu cach » tu cac
hoi van » hoi va, hoi dan, hai van
nhan va » nhan tai, nhan dan, nhan tao

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) or (hoc tap)), nghien cuu toan hoc nganh khang thuoc xa hoi van nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach ((thoi tap) OR (hoc tap)), nghien cuu toan hoc nganh khang thuoc xa hoi van nhan va.
• Adding a wildcard symbol may retrieve word variants: tu cach ((thoi tap) or (hoc tap)), nghien cuu toan hoc nganh khang thuoc xa hoi van nhan va*.