Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
duy sang » duy van, duy can, duy anh
mai khoi » mai khoa, tai khoa, cac khoi
ky tang » ky nang, ky dang, kho tang
bo sach » co sach, hoc sach
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
so sach » so sanh, co sach, hoc sach
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
vi cau » va cau, ve cau, di cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (bo sach)) ((duy sang) or (ky tang)) mai khoi. hieu ve cam xuc va hanh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) ((duy sang) OR (ky tang)) mai khoi. hieu ve cam xuc va hanh vi cau tren.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (bo sach)) ((duy sang) or (ky tang)) mai khoi. hieu ve cam xuc va hanh vi cau tren*.