Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
dang mai » dang hai, dang mau, dang bai
mai khoi » mai khoa, tai khoa, cac khoi
hanh tai » thanh tai, hang tai, han tai
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau treo
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ky dang » ky nang, ky danh
xuc va » duc va, tuc va, luc va
ve cam » ve cham, ve cac, va cam

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) or (tu cac)) ky dang mai khoi. hieu ve cam xuc va hanh tai ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (tu cac)) ky dang mai khoi. hieu ve cam xuc va hanh tai ((cuu tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (tu cac)) ky dang mai khoi. hieu ve cam xuc va hanh tai ((cuu tre) or (cau tren))*.