Perhaps you should try some spelling variations:
chu viet » che viet, khau viet, ngu viet
sach ty » sach y, sach tu, sach thu
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
xang xa » lang xa, mang xa, ang xa
su viet » so viet
ve cac » vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty xang xa hoi. hieu ((ve cac) OR (va cac)) thuc va hanh va ((chu viet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty xang xa hoi. hieu ((ve cac) OR (va cac)) thuc va hanh va ((chu viet) OR (su viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty xang xa hoi. hieu ((ve cac) OR (va cac)) thuc va hanh va ((chu viet) or (su viet))*".