Perhaps you should try some spelling variations:
cong thuoc » dong thuoc, long thuoc, cong thuong
hoc nganh » hoc nhanh
cong thuc » cong tac
mach hoc » cach hoc, dich hoc, anh hoc
nhan van » nhan dan, nhan va, phan van
so mach » so sach, tao mach, kon mach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
va nhan » van nhan, ca nhan, va phan
va hoi » xa hoi, va hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: so mach hoc tap, nghien cuu mon hoc nganh ((cong thuoc) OR (cong thuc)) va hoi va nhan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so mach hoc tap, nghien cuu mon hoc nganh ((cong thuoc) OR (cong thuc)) va hoi va nhan van".
• Adding a wildcard symbol may retrieve word variants: so mach hoc tap, nghien cuu mon hoc nganh ((cong thuoc) OR (cong thuc)) va hoi va nhan van*.