Perhaps you should try some spelling variations:
hang hai » hoang hai, hang tai, thanh hai
te sach » toc sach
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, nam duoc
va hang » van hang, va nang, va lang
y nang » ky nang, ly nang, v nang
cua tu » cua tuc, cua su, cua cu

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