Perhaps you should try some spelling variations:
bang khoa » hang khoa, dang khoa, vang khoa
danh nhan » doanh nhan, thanh nhan, benh nhan
cuu long » cuu cong, cuu tong, cuu nang
long luc » dong luc, long cuc, long lich
luc bang » luc sang, duc bang, luu bang
khoa hoc » hoa hoc
hoi danh » hop danh, hoi dan, hoc danh
nhan tao » nhan tai, nhan dan
tu sach » thu sach, su sach, te sach
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 sach) or (thu hoach)) hoc tap, nghien cuu long luc bang khoa hoc xa hoi danh nhan tao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) hoc tap, nghien cuu long luc bang khoa hoc xa hoi danh nhan tao.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) hoc tap, nghien cuu long luc bang khoa hoc xa hoi danh nhan tao*.