Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
khanh hoa » thanh hoa
toc mach » toc sach, hoc mac, tim mach
mach hoc » cach hoc, dich hoc, anh hoc
thu dong » thuy dong, tu dong, thu cong
dong hoc » dong co, dong luc
hang hoa » hang khoa, thanh hoa, hang va
nhan van » nhan dan, nhan va, phan van
va nhan » van nhan, ca nhan, va phan
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: toc mach hoc tap, nghien thu dong hoc ((khanh hoa) OR (hang hoa)) hoc xa hoi va nhan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc mach hoc tap, nghien thu dong hoc ((khanh hoa) OR (hang hoa)) hoc xa hoi va nhan van".
• Adding a wildcard symbol may retrieve word variants: toc mach hoc tap, nghien thu dong hoc ((khanh hoa) OR (hang hoa)) hoc xa hoi va nhan van*.