Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
hanh vii » hanh voi, hanh va, hanh noi
tang mai » tang ma, tang tai, lang mai
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
ky tang » ky nang, ky dang, kho tang
va cau » van cau, va dau, va cao
xuc va » duc va, tuc va, luc va

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 ky tang mai hoi. lieu ((va cau) or (va cac)) xuc va ((hanh vii) or (hanh vi)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang mai hoi. lieu ((va cau) OR (va cac)) xuc va ((hanh vii) OR (hanh vi)) cau tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang mai hoi. lieu ((va cau) or (va cac)) xuc va ((hanh vii) or (hanh vi)) cau tren*.