Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
dua tren » dung tren
sang tai » hang tai, sang tao, tang tai
tai hoi » tai khoi, dai hoi, tai hai
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
vai dua » dai dua, vai cua
ve cai » va cai, ve tai, ve cau
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
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 tai hoi. hieu ((ve cai) or (ve cac)) ((xuc va) or (luc va)) hanh vai dua tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky sang tai hoi. hieu ((ve cai) OR (ve cac)) ((xuc va) OR (luc va)) hanh vai dua tren.
• Adding a wildcard symbol may retrieve word variants: thu sach ky sang tai hoi. hieu ((ve cai) or (ve cac)) ((xuc va) or (luc va)) hanh vai dua tren*.