Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, cam thu
ve triet » va trien, su triet
ky lang » ky tang, tay lang
ky dang » ky danh
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh de » hanh de, dan de, dang de
te sac » te sach, te cac, te san
va cam » va cham, va cac, va cao

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

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