Perhaps you should try some spelling variations:
cong luong » cong thuong, nang luong, cong dong
cong dung » cuong dung, cong dong, thong dung
bai tran » ban tran, bao tran, bai trong
bai toan » bai tap
ban ke » ban kem, ban ve, ban le
ke mo » ke o, ke co, ke do
mo ta » mo tai, mo va, co ta

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

• Performing a fuzzy search may retrieve terms with similar spellings: truyen ((bai tran) or (bai toan)) chau đe co ban ke mo ta ((cong dung) OR (cong luong))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: truyen ((bai tran) OR (bai toan)) chau đe co ban ke mo ta ((cong dung) OR (cong luong)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "truyen ((bai tran) or (bai toan)) chau đe co ban ke mo ta ((cong dung) OR (cong luong))".
• Adding a wildcard symbol may retrieve word variants: truyen ((bai tran) or (bai toan)) chau đe co ban ke mo ta ((cong dung) OR (cong luong))*.