Perhaps you should try some spelling variations:
thuoc cach » thuoc sach, thuc cach, truoc cach
nganh khoa » nganh hoa, nganh khong, doanh khoa
cach thoi » cac thoi, cach thuc, cach noi
thoi tap » toi tap, hoc tap, thoi dai
cuu dong » cuu cong, cuu tong, cuu long
co nganh » hoc nganh, cac nganh, moi nganh
khoa hoc » hoa hoc
nhan tai » hang tai, van tai, toan tai
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
nhan va » nhan dan, nhan tao, phan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc cach thoi tap, nghien cuu dong co nganh khoa hoc mai hoi va ((nhan va) OR (nhan tai))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc cach thoi tap, nghien cuu dong co nganh khoa hoc mai hoi va ((nhan va) OR (nhan tai))".
• Adding a wildcard symbol may retrieve word variants: thuoc cach thoi tap, nghien cuu dong co nganh khoa hoc mai hoi va ((nhan va) OR (nhan tai))*.