Perhaps you should try some spelling variations:
thuat nganh » thuat lanh, thuat canh, luat nganh
cong thuat » trong thuat, vuong thuat, cong thuc
nghien cua » nghien cuu, nghiep cua, nghiep vua
nganh khoa » nganh hoa, nganh khong, doanh khoa
cach thuc » anh thuc, cac thu
van nhan » van phan, van thanh, danh nhan
mach hoc » cach hoc, dich hoc, anh hoc
khoa hoc » hoa hoc
mai hoi » mai khoi, dai hoi, lai hoi
hoi van » hoi va, hoi dan, hai van
hoc mai » hoc ma, hoc dai, hoc bai
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: tu ((mach hoc) or (cach thuc)) tap, nghien cua cong thuat nganh khoa hoc mai hoi van nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((mach hoc) OR (cach thuc)) tap, nghien cua cong thuat nganh khoa hoc mai hoi van nhan va.
• Adding a wildcard symbol may retrieve word variants: tu ((mach hoc) or (cach thuc)) tap, nghien cua cong thuat nganh khoa hoc mai hoi van nhan va*.