Perhaps you should try some spelling variations:
pham huu » pham duc, pham duy, phan huy
ban hanh » ban hang
thai cua » than cua, tai cuc, tri cua
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
cua te » cua tu
su can » su van, su cao, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (su can)) ky nang xa hoi. hieu van pham huu ((ban hanh) or (va danh)) thai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (su can)) ky nang xa hoi. hieu van pham huu ((ban hanh) OR (va danh)) thai cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (su can)) ky nang xa hoi. hieu van pham huu ((ban hanh) or (va danh)) thai cua te*.