Perhaps you should try some spelling variations:
sang mai » lang mai, hoang mai, giang mai
hanh vai » hanh vi, hanh va, hanh tai
sang tai » hang tai, sang tao, tang tai
su sach » so sach, vu sach
vai cuu » vai cua
va hanh » van hanh, va thanh, va danh
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
sang ma » tang ma, nang ma, sang tao
cuu tre » cua tre, cau tren, cau treo
ve cac » va cac, vien cac
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: su sach ky ((((sang mai) OR (sang ma))) or (sang tai)) hoi. hieu ve cac xuc va hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((((sang mai) OR (sang ma))) OR (sang tai)) hoi. hieu ve cac xuc va hanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((((sang mai) OR (sang ma))) or (sang tai)) hoi. hieu ve cac xuc va hanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((((sang mai) OR (sang ma))) or (sang tai)) hoi. hieu ve cac xuc va hanh vai cuu tre*.