Perhaps you should try some spelling variations:
ve triet » va trien, su triet
te sach » toc sach
ky lang » ky dang, ky tang, tay lang
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va dang » van dang, va nang, va lang
dang de » dang deo, dung de, dang do
te sac » te cac, te san
va am » va lam, va cam

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