Perhaps you should try some spelling variations:
nganh khung » nganh khong, nhanh hung
hoc nganh » hoc nhanh
khung hoc » chung hoc, nhung hoc, thuong hoc
sach hoc » cach hoc, sach hoi, mach hoc
nhan dan » phan dau, gian dan, nhan tai
so sach » so sanh, bo sach, co sach
cuu hoa » cuu khoa, cuu hoan, cau hoa
mai hoi » mai khoi, dai hoi, lai hoi
va nhan » van nhan, ca nhan, va phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach hoc tap, nghien cuu hoa hoc nganh khung hoc ((mai hoi) or (ma hoa)) va nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach hoc tap, nghien cuu hoa hoc nganh khung hoc ((mai hoi) OR (ma hoa)) va nhan dan.
• Adding a wildcard symbol may retrieve word variants: so sach hoc tap, nghien cuu hoa hoc nganh khung hoc ((mai hoi) or (ma hoa)) va nhan dan*.