Perhaps you should try some spelling variations:
thien van » thi van
phan duc » pham duc, phan tu, phan dau
hanh hai » thanh hai, nhanh hai, hang hai
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
cua cu » cua chu, cua cau, cua su
x hoi » xa hoi, o hoi, 5 hoi

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang ((x hoi) OR (x ho)). ((hieu ve) OR (thien van)) phan duc va hanh hai cua cu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky nang ((x hoi) OR (x ho)). ((hieu ve) or (thien van)) phan duc va hanh hai cua cu~".
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang ((x hoi) OR (x ho)). ((hieu ve) or (thien van)) phan duc va hanh hai cua cu*.