Perhaps you should try some spelling variations:
nghiep can » nghiep chan, nghiep cay, nghiep cau
van thanh » ban thanh, van tuan
thanh van » thanh san, thanh toan, thanh phan
mach hoc » cach hoc, dich hoc, anh hoc
can dong » van dong, dan dong, cao dong
hoa toan » hop toan, hoa than, hoach toan
khoa hoc » hoa hoc
tu mach » tu cach, tu manh, tu hach
hoa tan » hoa dan, hoa van, hoa tin
hoi van » hoi va, hoi dan, hai van
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, nghiep can dong ((hoa toan) OR (hoa tan)) khoa hoc xa hoi van thanh van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, nghiep can dong ((hoa toan) OR (hoa tan)) khoa hoc xa hoi van thanh van*".