Perhaps you should try some spelling variations:
sach hoi » sach doi, sach moi, cach thoi
cuu dong » cuu cong, cuu tong, cuu long
co thanh » cho thanh, o thanh, co tranh
cong hoc » dong hoc, cong hoa, cong coc
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
va lang » va nang, hoa lang
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 hoi dap, nghien cuu dong co thanh cong hoc xa hoi ((va hanh) or (va lang)) dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi dap, nghien cuu dong co thanh cong hoc xa hoi ((va hanh) OR (va lang)) dau.
• Adding a wildcard symbol may retrieve word variants: tu sach hoi dap, nghien cuu dong co thanh cong hoc xa hoi ((va hanh) or (va lang)) dau*.