Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
dang hai » dang khai, hang hai, dung hai
nang cay » nang cao, nang cap, nang cai
cay phoi » cap phoi, tay hoi, cay cho
thuc day » thuc dan, thuc vat
hai cua » thai cua, dai cua, hoi cua
thuc va » thuc vat, thuc dan
tu cach » tu cac
hieu ve » hieu va, hieu van
te sach » toc sach
ve pham » vi pham, v pham, ve phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (te sach)) ky nang cay phoi. hieu ve pham ((thuc va) OR (thuc day)) dang hai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) ky nang cay phoi. hieu ve pham ((thuc va) OR (thuc day)) dang hai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (te sach)) ky nang cay phoi. hieu ve pham ((thuc va) OR (thuc day)) dang hai cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky nang cay phoi. hieu ve pham ((thuc va) OR (thuc day)) dang hai cua viet*.