Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
thanh vi » thanh va, thanh ve, nhanh vi
thu sach » thuat sach, thuoc sach, thu hoach
cau xuc » cam xuc, cau luc, cau truc
tu sach » su sach, te sach, tu cach
hieu va » lieu va, hieu qua
xang xa » lang xa, mang xa, ang xa
xuc va » duc va, tuc va, luc va
y xang » ty xang
va cau » van cau, va cac, va dau

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