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