Perhaps you should try some spelling variations:
ve triet » va trien
su triet » su viet, su tien
dinh de » dinh ve, dinh du, dinh le
te sach » toc sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va dinh » van dinh, va kinh, va tinh
te sac » te cac, te san
ve am » va am

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