Perhaps you should try some spelling variations:
nhanh chong » thanh cong
ban thanh » ban hanh, ban hang
thanh dan » thanh san, thanh van, thanh dat
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
tu sach » thu sach, su sach, te sach
hoi ban » hoi dan, hoi bai, doi ban
doc xa » duoc xa, hoc xa, do xa

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 hoc ((nhanh chong) OR (khanh phong)) doc xa hoi ban thanh dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoc tap, nghien cuu dong hoc ((nhanh chong) OR (khanh phong)) doc xa hoi ban thanh dan".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu dong hoc ((nhanh chong) OR (khanh phong)) doc xa hoi ban thanh dan*.