Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
su sach » so sach, vu sach
duc van » duc tan, duc manh, duc phan
tai cua » thai cua, tai cuc, tri cua
y nang » ly nang, v nang, may nang
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: su sach ((y nang) OR (ky nang)) x hoi. hieu van nam ((duc van) or (duc va)) hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ky nang)) x hoi. hieu van nam ((duc van) OR (duc va)) hanh tai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (ky nang)) x hoi. hieu van nam ((duc van) or (duc va)) hanh tai cua te*".