Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
ve triet » va trien, su triet
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, mang may
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky ((nang ma) OR (nang cao)) hoi. hieu ve cam xuc va hanh vi ((cua te) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky ((nang ma) OR (nang cao)) hoi. hieu ve cam xuc va hanh vi ((cua te) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky ((nang ma) OR (nang cao)) hoi. hieu ve cam xuc va hanh vi ((cua te) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky ((nang ma) OR (nang cao)) hoi. hieu ve cam xuc va hanh vi ((cua te) or (ve triet))*.