Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
pham duy » pham duc
ban hanh » ban hang
lam cua » nam cua, lam chat
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky nang x hoi. hieu van pham duy ((ban hanh) or (van thanh)) lam cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang x hoi. hieu van pham duy ((ban hanh) OR (van thanh)) lam cua vat.
• Adding a wildcard symbol may retrieve word variants: tu san ky nang x hoi. hieu van pham duy ((ban hanh) or (van thanh)) lam cua vat*.