Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
cay dua » chay dua, cay lua, ca dua
cam dua » ca dua, chay dua, cach dua
hang ca » hang va, nang cao, hang tai
ly hang » ly quang
so sanh » do sanh
ca hoi » cau hoi, cua hoi, xa hoi
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sanh)) ly hang ca hoi. hieu qua ((cam dua) OR (cay dua)) ban thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) ly hang ca hoi. hieu qua ((cam dua) OR (cay dua)) ban thanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) ly hang ca hoi. hieu qua ((cam dua) OR (cay dua)) ban thanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) ly hang ca hoi. hieu qua ((cam dua) OR (cay dua)) ban thanh vi cua te*.