Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh di » hanh vi, hanh de, hang di
sang ky » sang kyo, dang ky, tang ky
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
di cua » dai cua, doi cua, de cua
tuc va » truc va, tuc xa, duc va
dan ky » van ky
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: tu ((dan ky) or (sang ky)) lang xa hoi. hieu va cam ((tuc va) OR (thuc va)) hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((dan ky) OR (sang ky)) lang xa hoi. hieu va cam ((tuc va) OR (thuc va)) hanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((dan ky) or (sang ky)) lang xa hoi. hieu va cam ((tuc va) OR (thuc va)) hanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((dan ky) or (sang ky)) lang xa hoi. hieu va cam ((tuc va) OR (thuc va)) hanh di cua triet*.