Perhaps you should try some spelling variations:
sang tao » hang tai
hanh dai » hanh tai, hanh dao, vanh dai
ve triet » va trien, su triet
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
va cam » va cham, va cac, va cao
dai ve » dap ve, dau ve, dai va

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 y ((nang ma) or (sang tao)) hoi. hieu va cam duc va hanh dai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((nang ma) OR (sang tao)) hoi. hieu va cam duc va hanh dai ve triet.
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang ma) or (sang tao)) hoi. hieu va cam duc va hanh dai ve triet*.