Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh tai » thanh tai, hang tai, han tai
tang mai » tang ma, tang tai, lang mai
hanh van » thanh van, khanh van, hanh va
sach ky » sac ky, sach y, sach ty
ca tren » cau tren, cu tren, la tren
mai hoi » mai khoi, dai hoi, lai hoi
ky tang » ky nang, ky dang, kho tang
ve cac » va cac, vien cac
ve tai » te tai, de tai, le tai
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: thu sach ky tang mai hoi. hieu ((ve tai) or (ve cac)) xuc va ((hanh van) or (hanh tai)) ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky tang mai hoi. hieu ((ve tai) OR (ve cac)) xuc va ((hanh van) OR (hanh tai)) ca tren.
• Adding a wildcard symbol may retrieve word variants: thu sach ky tang mai hoi. hieu ((ve tai) or (ve cac)) xuc va ((hanh van) or (hanh tai)) ca tren*.