Perhaps you should try some spelling variations:
nhan chong » nhanh chong, nhan khong, nhan thong
chong hoc » chung hoc, chong doc, thong hoc
sach hoi » sach doi, cach thoi, hoach hoi
sach moi » sach doi, bach mai, sach bai
cuu dong » cuu cong, cuu tong, cuu long
dong luc » nang luc
luc nhan » luc nhat, cu nhan, tue nhan
phan tan » phan van, phan tap, phan lan
va phan » van phan, va phat, va phap
ma hoi » mai hoi, xa hoi, ma hoa

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