Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, cua triet
hanh le » thanh le, hanh ve, hanh de
luu van » cuu van, luan van, luu hanh
te sach » toc sach
nang xa » lang xa, nang ma, mang xa
hau luu » hat luu, phap luu
va hau » van hau, va chau, vat hau

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 y ((nang xa) or (nang x)) hoi. lieu va hau luu van hanh le ((cua tre) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (nang x)) hoi. lieu va hau luu van hanh le ((cua tre) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) or (nang x)) hoi. lieu va hau luu van hanh le ((cua tre) or (va triet))*.