Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
nang cay » nang cao, nang cap, nang cai
cay phoi » cap phoi, tay hoi, cay cho
hai cua » thai cua, hoi cua, lai cua
va dang » van dang, va nang, va lang
thuc va » thuc vat, thuc dan, thuc day
tu cach » tu cac
va pham » van pham, va phat, va phap
te sach » toc sach
hieu va » lieu va, hieu qua

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 va pham thuc va dang ((hai cua) OR (dai 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 va pham thuc va dang ((hai cua) OR (dai 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 va pham thuc va dang ((hai cua) OR (dai cua)) viet".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky nang cay phoi. hieu va pham thuc va dang ((hai cua) OR (dai cua)) viet*.