Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
truc ban » thuc ban, truc dan, truc van
ban dinh » ban tinh, van dinh, ban dich
sach ty » sach y, sach tu, xach tay
xang xa » lang xa, mang xa, ang xa
qua cau » quan cau, qua cac, qua ca
vi cua » vai 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: vu ((sach ty) OR (sach thu)) xang xa hoi. hieu qua cau truc ban dinh ((vi cua) OR (dai cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ty) OR (sach thu)) xang xa hoi. hieu qua cau truc ban dinh ((vi cua) or (dai cua)) te~".
• Adding a wildcard symbol may retrieve word variants: vu ((sach ty) OR (sach thu)) xang xa hoi. hieu qua cau truc ban dinh ((vi cua) or (dai cua)) te*.