Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cau tren » cu tren, dau tren, ca tren
dang xay » dang van, van xay
nay thuc » nam thuc, cay thuc, day thuc
dan vai » dan va, dan tai, dan vat
thuc va » thuc vat, thuc dan, thuc day
toc sac » toc sach, toc san, hoc sach
lang xa » lang ha, lang van
qua nay » qua ngay, qua xay, qua cay
sac ky » cac ky, sai ky
va dan » ca dan, va dao, va dau

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

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