Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cay phoi » cap phoi, tay hoi, cay cho
cac tuc » cac toc, cac tu, cac tac
cua tre » cua te, cuu tre, dua tren
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
tuc va » thuc va, truc va, tuc xa
tu san » thu san, tu ban, tu can
may va » may vi, day va
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ((ly va) or (may va)) cay phoi. hieu ve cac tuc va hanh di ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ((ly va) OR (may va)) cay phoi. hieu ve cac tuc va hanh di ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ((ly va) or (may va)) cay phoi. hieu ve cac tuc va hanh di ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu san ((ly va) or (may va)) cay phoi. hieu ve cac tuc va hanh di ((cua tre) OR (cua triet))*.