Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van phat » va phat, van chat, van phan
phat duc » pham duc, phan duc, phan duoc
van hanh » van thanh, ban hanh, van anh
hanh tai » thanh tai, hang tai, han tai
so sach » so sanh, bo sach, co sach
ty nang » ty xang, ty hang, ly nang
duc van » duc va, duc tan, duc manh
tai cua » thai cua, tai cuc, tri cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 ((ty nang) OR (ky nang)) x hoi. hieu van phat duc van hanh tai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ty nang) OR (ky nang)) x hoi. hieu van phat duc van hanh tai cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ((ty nang) OR (ky nang)) x hoi. hieu van phat duc van hanh tai cua te*.