Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach han » sach tham, sach danh, sach nang
han lang » nhan lang, ban lang, ha lang
lang xa » lang ha, dang xay, lang van
va cham » va chat, va tham
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
ve cai » va cai, ve cac, ve tai
vi cua » vai cua, di cua
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 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 lang xa hoi. hieu ((ve cai) or (va cham)) thuc va hanh vi cua tu*.