Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thai cua » than cua, tai cuc, dai cua
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
hieu va » lieu va, hieu qua
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
sai ky » sac ky
su sai » su tai, su hai, su dai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ky lang xa hoi. ((hieu ve) or (hieu va)) cam duc van thanh ((thai cua) OR (tri cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky lang xa hoi. ((hieu ve) OR (hieu va)) cam duc van thanh ((thai cua) OR (tri cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ky lang xa hoi. ((hieu ve) or (hieu va)) cam duc van thanh ((thai cua) OR (tri cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sai ky lang xa hoi. ((hieu ve) or (hieu va)) cam duc van thanh ((thai cua) OR (tri cua)) tre*.