Perhaps you should try some spelling variations:
khong hoc » khung hoc, thong hoc, khong thuoc
chung hoc » trung hoc, dung hoc, hung hoa
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
dong luc » nang luc
van nhan » van phan, van thanh, danh nhan
tu sach » thu sach, su sach, te sach
hoi van » hoi va, hoi dan, hai van
nhan va » nhan tai, nhan dan, nhan tao

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 hoc tap, nghien cuu dong luc canh ((khong hoc) or (chung hoc)) xa hoi van nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cuu dong luc canh ((khong hoc) OR (chung hoc)) xa hoi van nhan va.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu dong luc canh ((khong hoc) or (chung hoc)) xa hoi van nhan va*.