Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
hanh dai » hanh tai, vanh dai, thanh dat
hanh dao » lanh dao, thanh dat, thanh dam
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, lang xa, nang ma
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
soc va » hoc va, loc va, doc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang xa hoi. hieu van cham soc va ((hanh dai) OR (hanh dao)) cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang xa hoi. hieu van cham soc va ((hanh dai) OR (hanh dao)) cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. hieu van cham soc va ((hanh dai) OR (hanh dao)) cua viet*.