Perhaps you should try some spelling variations:
nganh khong » nganh cong, nganh nong, nganh khoa
nhanh chong » thanh cong, khanh phong
thuoc sach » hoc sach, nuoc sach, thuat sach
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
va nhan » van nhan, ca nhan, va phan
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: thuoc sach hoc tap, nghien cuu dong co ((nganh khong) OR (nhanh chong)) hoc mai hoi va nhan va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach hoc tap, nghien cuu dong co ((nganh khong) OR (nhanh chong)) hoc mai hoi va nhan va".
• Adding a wildcard symbol may retrieve word variants: thuoc sach hoc tap, nghien cuu dong co ((nganh khong) OR (nhanh chong)) hoc mai hoi va nhan va*.