Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cham duy » pham duy, pham duc, cham cuu
qua cham » qua hai, qua cac, va cham
sinh cua » manh cua, dinh cuu, sinh va
duy ban » uy ban, duy van, duy can
su sach » so sach
xang xa » lang xa, mang xa, ang xa
vu sach » vu bach, vu khach
vi lua » vi luu

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 (vu sach)) ty xang xa hoi. hieu qua cham duy ban thanh ((vi lua) or (sinh cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ty xang xa hoi. hieu qua cham duy ban thanh ((vi lua) OR (sinh cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ty xang xa hoi. hieu qua cham duy ban thanh ((vi lua) or (sinh cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) ty xang xa hoi. hieu qua cham duy ban thanh ((vi lua) or (sinh cua)) tre*.