Perhaps you should try some spelling variations:
sach nang » cach mang, sach dung, sach danh
sach han » sach tham, sach danh, sach dao
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
lang xa » lang ha, dang xay, lang van
thuc va » thuc vat, thuc dan, thuc day
vi cua » vai cua, di cua
ve cai » va cai, ve cac, ve tai
cua tu » cua tuc, cua su, cua cu

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: thu ((sach han) OR (sach nang)) lang xa hoi. hieu ((ve cai) OR (va cham)) thuc va hanh vi cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach han) OR (sach nang)) lang xa hoi. hieu ((ve cai) or (va cham)) thuc va hanh vi cua tu~".
• Adding a wildcard symbol may retrieve word variants: thu ((sach han) OR (sach nang)) lang xa hoi. hieu ((ve cai) or (va cham)) thuc va hanh vi cua tu*.