Perhaps you should try some spelling variations:
va hanh » van hanh, va thanh, va danh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
hai cua » thai cua, dai cua, hoi cua
cao tuc » cao duc, cao suc, cao toc
vai cua » dai cua, lai cua, bai cua
dao tuc » dao duc
tu bai » tu ban, tu bat, te bai
bai ky » ban ky, sai ky, bac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu bai ky nang xa hoi. hieu va ((cao tuc) or (dao tuc)) va hanh ((vai cua) or (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bai ky nang xa hoi. hieu va ((cao tuc) OR (dao tuc)) va hanh ((vai cua) OR (hai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu bai ky nang xa hoi. hieu va ((cao tuc) or (dao tuc)) va hanh ((vai cua) or (hai cua)) tre*.