Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau tren » dau tren, ca tren, cau treo
sang mai » sang ma, sang tai, lang mai
hanh vai » hanh vi, hanh va, hanh tai
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
cu tren » tu tren, dua tren
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
tuc va » thuc va, truc va, tuc xa
ve cai » va cai, ve tai, ve cau
ve cac » va cac, vien cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky sang mai hoi. hieu ((ve cai) or (ve cac)) tuc va hanh vai ((cau tren) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky sang mai hoi. hieu ((ve cai) OR (ve cac)) tuc va hanh vai ((cau tren) OR (cu tren)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky sang mai hoi. hieu ((ve cai) or (ve cac)) tuc va hanh vai ((cau tren) or (cu tren))*.