Perhaps you should try some spelling variations:
hang hai » hoang hai, hang tai, thanh hai
te sach » toc sach
hieu ve » hieu van
hieu va » lieu va, hieu qua
va hang » van hang, va nang, va lang
hai cua » thai cua, dai cua, hoi cua
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, me hoi
cua su » qua su

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: te sach y nang ((ma hoi) OR (ma hoa)). ((hieu ve) OR (hieu va)) giao duc va hang hai cua su~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((ma hoi) or (ma hoa)). ((hieu ve) OR (hieu va)) giao duc va hang hai cua su~".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((ma hoi) or (ma hoa)). ((hieu ve) OR (hieu va)) giao duc va hang hai cua su*.