Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
mach hoc » cach hoc, dich hoc, anh hoc
dong hoc » dong luc
khoa hoc » hoa hoc
gian dan » gian lang
tu mach » tu cach, tu manh, tu hach
va gian » va gianh, van gian, va giai
hoc xa » hoc ma

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 ((dong hoc) OR (dong co)) nganh khoa hoc xa hoi va gian dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, nghien cuu ((dong hoc) OR (dong co)) nganh khoa hoc xa hoi va gian dan".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu ((dong hoc) OR (dong co)) nganh khoa hoc xa hoi va gian dan*.