Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
sach ty » sach tu, sach thu, xach tay
xang xa » lang xa, mang xa, ang xa
va cau » van cau, va cac, va cao
va dau » va dao
tuc va » thuc va, truc va, tuc xa
vi cau » ve cau, di cau, viet cau

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