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, hanh dao, vanh dai
cua viet » ca viet, cua vat, cua dieu
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
va hanh » van hanh, va thanh, va danh
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 lang xa hoi. hieu van cham soc va hanh dai ((cua viet) OR (hoa viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky lang xa hoi. hieu van cham soc va hanh dai ((cua viet) OR (hoa viet))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky lang xa hoi. hieu van cham soc va hanh dai ((cua viet) OR (hoa viet))*.