Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
sach hoc » cach hoc, sach hoi, mach hoc
thu dong » thuy dong, tu dong, thu cong
hanh hoa » thanh hoa, khanh hoa, hang hoa
nhan van » nhan dan, nhan va, phan van
te sach » toc sach
co hanh » co thanh, co phanh, co anh
hoi ca » hoi cua, hoi cac, hoi cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach hoc tap, nghien thu dong co hanh hoa ((hoc xa) or (hoc ma)) hoi ca nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach hoc tap, nghien thu dong co hanh hoa ((hoc xa) OR (hoc ma)) hoi ca nhan van.
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien thu dong co hanh hoa ((hoc xa) or (hoc ma)) hoi ca nhan van*.