Perhaps you should try some spelling variations:
van phong » van dong
van phan » van thanh, luan phan, van ban
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cao hoc » co hoc, cho hoc, chat hoc
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang cao hoc. hieu ((van phan) or (((van phong) or (hai phong)))) duc va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang cao hoc. hieu ((van phan) OR (((van phong) OR (hai phong)))) duc va hanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang cao hoc. hieu ((van phan) or (((van phong) or (hai phong)))) duc va hanh vai cua te*.