Perhaps you should try some spelling variations:
luc nganh » luc ngan, chuc nganh, luat nganh
mach hoc » cach hoc, dich hoc, anh hoc
cuu dong » cuu cong, cuu tong, cuu long
dong luc » nang luc
van gian » van giang, dan gian, van giao
gian dan » gian lang
tu mach » tu cach, tu manh, tu hach
hoi van » hoi va, hoi dan, hai van

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