Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
nang xa » lang xa, nang ma, mang xa
hieu he » hieu ve, hiem he, hieu le
thu van » thuc van, thuy van, tu van
hanh di » hanh vi, hanh de, hang di
sac ky » sai ky
he nam » ha nam, nghe nam
di cua » dai cua, doi cua, de 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: vu ((sac ky) OR (cac ky)) ((nang xa) or (nang x)) hoi. hieu he nam thu van hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sac ky) OR (cac ky)) ((nang xa) OR (nang x)) hoi. hieu he nam thu van hanh di cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sac ky) OR (cac ky)) ((nang xa) or (nang x)) hoi. hieu he nam thu van hanh di cua te*".