Perhaps you should try some spelling variations:
nhanh chung » nhanh chuong, nhanh chong, nhanh hung
dac nhanh » dac nhan, day nhanh, doc nhanh
chung hoc » trung hoc, dung hoc, hung hoa
doc sach » hoc sach, toc sach, nuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
cong dac » cong tac, cong dan, cong cac
van nhan » van phan, van thanh, danh nhan
va nhan » ca nhan, va phan, va nha
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: doc sach hoc tap, nghien cuu cong dac nhanh chung hoc xa hoi ((va nhan) or (van nhan)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach hoc tap, nghien cuu cong dac nhanh chung hoc xa hoi ((va nhan) OR (van nhan)) van.
• Adding a wildcard symbol may retrieve word variants: doc sach hoc tap, nghien cuu cong dac nhanh chung hoc xa hoi ((va nhan) or (van nhan)) van*.