Perhaps you should try some spelling variations:
dang xay » dang van
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nam loc » nam lo, nam moc, nam soc
vai cua » dai cua, hai cua, lai cua
loc va » hoc va, luc va
vi cua » di cua

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 ky ((dang xay) or (van xay)) hoi. hieu van nam loc va thanh ((vi cua) or (vai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky ((dang xay) OR (van xay)) hoi. hieu van nam loc va thanh ((vi cua) OR (vai cua)) te.
• Adding a wildcard symbol may retrieve word variants: vu sach ky ((dang xay) or (van xay)) hoi. hieu van nam loc va thanh ((vi cua) or (vai cua)) te*.