Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ban hanh » ban hang
va triet » va thiet, va trien, ve triet
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
ban dan » ban hang, ban quan, gian dan
y nang » ly nang, v nang, may nang
va cam » va cham, va cac, va cao
dai va » mai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((y nang) or (ky nang)) mai hoi. hieu va cam xuc ((ban dan) or (ban hanh)) dai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y nang) OR (ky nang)) mai hoi. hieu va cam xuc ((ban dan) OR (ban hanh)) dai va triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) or (ky nang)) mai hoi. hieu va cam xuc ((ban dan) or (ban hanh)) dai va triet*.