Perhaps you should try some spelling variations:
tinh doi » trinh doc, trinh do, tinh hoc
cua viet » hoa viet, cua vat, cua dieu
ca viet » va viet, co viet, hoa viet
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu van
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va tinh » may tinh
te lai » te tai, te bai
lai ky » sai ky, dai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te lai ky lang xa hoi. ((hieu ve) or (hieu va)) am thuc va tinh doi ((cua viet) OR (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te lai ky lang xa hoi. ((hieu ve) OR (hieu va)) am thuc va tinh doi ((cua viet) OR (ca viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te lai ky lang xa hoi. ((hieu ve) or (hieu va)) am thuc va tinh doi ((cua viet) OR (ca viet))".
• Adding a wildcard symbol may retrieve word variants: te lai ky lang xa hoi. ((hieu ve) or (hieu va)) am thuc va tinh doi ((cua viet) OR (ca viet))*.