Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
tinh doi » trinh doc, trinh do, tinh hoc
dang xay » dang van, van xay
hieu va » lieu va, hieu qua
doi cua » dai cua, hoi cua
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu van
va tinh » may tinh
thuc va » thuc vat, thuc dan, thuc day
te lai » te bai

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