Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
thanh phan » thanh pho, thanh san, thanh toan
luc nganh » luc ngan, chuc nganh, luat nganh
thanh hoa » thanh pho
mach hoc » cach hoc, dich hoc, anh hoc
cuu long » cuu cong, cuu tong, cuu nang
long luc » dong luc, long cuc, long lich
khoa hoc » hoa hoc
tu mach » tu cach, tu manh, tu hach
hai van » thai van, ha van, hai tan
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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 tap, nghien cuu long luc nganh khoa hoc xa hai van ((thanh phan) or (thanh hoa))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien cuu long luc nganh khoa hoc xa hai van ((thanh phan) OR (thanh hoa)).
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu long luc nganh khoa hoc xa hai van ((thanh phan) or (thanh hoa))*.