Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
pham duy » pham duc
vinh cuu » dinh cuu, sinh cua, dinh cu
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
duy ban » uy ban, duy van, duy can
vi cuu » 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: vu sach ty xang xa hoi. hieu va pham duy ban thanh ((vi cuu) or (vinh cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty xang xa hoi. hieu va pham duy ban thanh ((vi cuu) OR (vinh cuu)) tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ty xang xa hoi. hieu va pham duy ban thanh ((vi cuu) or (vinh cuu)) tre*.