Perhaps you should try some spelling variations:
sanh tay » canh tay, san tay, thanh tay
tay lang » tai lang, tay tang, tay quang
cao thuc » cao thuoc, bao thuc, can thuc
va triet » ve triet, cua triet, va viet
va trien » va truyen, va tuyen, va tieng
so sanh » do sanh
lang xa » lang ha, dang xay, lang van
qua cao » qua cac, qua ca, qua cai
thuc va » thuc vat, thuc dan, thuc day
va lang » va nang, hoa lang
lang di » lang dai, hang di, lang du
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh tay lang xa hoi. hieu qua cao thuc va lang di ((((va triet) OR (va trien))) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh tay lang xa hoi. hieu qua cao thuc va lang di ((((va triet) OR (va trien))) OR (va thiet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh tay lang xa hoi. hieu qua cao thuc va lang di ((((va triet) OR (va trien))) or (va thiet))*".