Perhaps you should try some spelling variations:
nganh khung » nganh khong, nhanh hung
thuoc cach » thuoc sach, thuc cach, truoc cach
nghien cua » nghien cuu, nghiep cua, nghiep vua
hoa nganh » hoc nganh, khoi nganh, hoa doanh
khung hoc » chung hoc, nhung hoc, thuong hoc
thoi tap » hoc tap, thoi dai, hoi tai
cong hoa » dong hoa, dong hoc, hang hoa
toi tap » toi gap, toan tap, tong tap
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 cach ((thoi tap) OR (toi tap)), nghien cua cong hoa nganh khung hoc mai hoi va nhan va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc cach ((thoi tap) OR (toi tap)), nghien cua cong hoa nganh khung hoc mai hoi va nhan va".
• Adding a wildcard symbol may retrieve word variants: thuoc cach ((thoi tap) OR (toi tap)), nghien cua cong hoa nganh khung hoc mai hoi va nhan va*.