Perhaps you should try some spelling variations:
sang tao » hang tai
hanh dai » hanh tai, hanh dao, vanh dai
va trien » va truyen, va thiet, va tuyen
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
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: so sach y ((nang ma) or (sang tao)) hoi. hieu va cam luc va hanh dai va trien~.
• 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 luc va hanh dai va trien.
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang ma) or (sang tao)) hoi. hieu va cam luc va hanh dai va trien*.