Perhaps you should try some spelling variations:
hanh nhan » thanh nhan, danh nhan, anh nhan
thu sach » tu sach, thuat sach, thuoc sach
sach hoi » sach doi, sach moi, cach thoi
cuu dong » cuu cong, cuu tong, cuu long
co nhanh » co hanh, co phanh, chi nhanh
co thanh » cho thanh, o thanh, co tranh
khoa hoc » hoa hoc
hoc hanh » hoc nhanh, hoc thanh, hoc anh
nhan van » nhan dan, nhan va, phan van
hoc xa » hoc ma
xa hoc » xa hoi, va hoc, xa hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach hoi trac, nghien cuu dong ((co nhanh) OR (co thanh)) khoa hoc xa hoc hanh nhan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach hoi trac, nghien cuu dong ((co nhanh) OR (co thanh)) khoa hoc xa hoc hanh nhan van".
• Adding a wildcard symbol may retrieve word variants: thu sach hoi trac, nghien cuu dong ((co nhanh) OR (co thanh)) khoa hoc xa hoc hanh nhan van*.