Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
sach ty » sach tu, sach thu, xach tay
hang xa » hoang xa, hang va, hang ca
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
vi cua » di cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) hang xa hoi. hieu va pham thuc va hanh ((vi cua) OR (vai cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach y)) hang xa hoi. hieu va pham thuc va hanh ((vi cua) OR (vai cua)) te~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach y)) hang xa hoi. hieu va pham thuc va hanh ((vi cua) OR (vai cua)) te*.