Perhaps you should try some spelling variations:
vu thanh » su thanh, vu khanh, cuu thanh
thanh ky » hanh ky, than ky, thanh tay
hieu van » hieu va, thien van, lieu va
hai trac » hoi trac, khai thac, thai tran
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, nang ma
van hai » van ha, van chat, van phan
va hanh » va thanh, va danh, ban hanh
vai cua » hai cua, lai cua, bai cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu thanh ky nang xa hoi. hieu van hai trac ((va hanh) or (van hanh)) ((vai cua) OR (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu thanh ky nang xa hoi. hieu van hai trac ((va hanh) OR (van hanh)) ((vai cua) OR (dai cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu thanh ky nang xa hoi. hieu van hai trac ((va hanh) or (van hanh)) ((vai cua) OR (dai cua)) tre*".