Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
dang xay » dang van, van xay
tinh doi » trinh doc, trinh do, tinh hoc
thuc day » thuc dan, thuc vat
thuc va » thuc vat, thuc dan
doi cua » dai cua, hoi cua
hieu va » lieu va, hieu qua
hieu ve » hieu van
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
lai ky » sai ky, dai ky
te lai » te tai, 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 ky dang xay hoi. ((hieu ve) or (hieu va)) am ((thuc va) OR (thuc day)) tinh doi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te lai ky dang xay hoi. ((hieu ve) OR (hieu va)) am ((thuc va) OR (thuc day)) tinh doi cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te lai ky dang xay hoi. ((hieu ve) or (hieu va)) am ((thuc va) OR (thuc day)) tinh doi cua viet*".