Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
cong cao » cong cau, cong cac, cong co
cao danh » cao dang, cao anh, cau danh
danh hoa » thanh hoa, khanh hoa, nganh hoa
nhan dan » phan dau, gian dan, nhan tai
tu hach » tu hanh, tu sach, vu khach
tu cach » tu cac
hoc xa » hoc ma
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: ((tu hach) or (tu cach)) hoc tap, nghien thu cong cao danh hoa hoc xa hoi ca nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu hach) OR (tu cach)) hoc tap, nghien thu cong cao danh hoa hoc xa hoi ca nhan dan.
• Adding a wildcard symbol may retrieve word variants: ((tu hach) or (tu cach)) hoc tap, nghien thu cong cao danh hoa hoc xa hoi ca nhan dan*.