Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
phat duy » pham duy, phat huy, phan duy
vinh cuu » dinh cuu, sinh cua, dinh cu
bo sach » co sach, hoc sach
sach ty » sach y, sach tu, sach thu
ty mang » ty xang, ty hang, tin mang
mang xa » lang xa, mang may, dang xay
hieu va » lieu va, hieu qua
duy van » duy vat, dung van
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: bo sach ty mang xa hoi. hieu va phat duy van thanh ((vi cuu) or (vinh cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ty mang xa hoi. hieu va phat duy van thanh ((vi cuu) OR (vinh cuu)) tre.
• Adding a wildcard symbol may retrieve word variants: bo sach ty mang xa hoi. hieu va phat duy van thanh ((vi cuu) or (vinh cuu)) tre*.