Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
hanh vai » hanh vi, hanh va, hanh van
hanh tai » thanh tai, hang tai, han tai
so sach » bo sach, co sach, hoc sach
so sanh » do sanh
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) or (so sanh)) ky nang x hoi. hieu van pham duc va ((hanh vai) OR (hanh tai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ky nang x hoi. hieu van pham duc va ((hanh vai) OR (hanh tai)) cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (so sanh)) ky nang x hoi. hieu van pham duc va ((hanh vai) OR (hanh tai)) cua te*".