Perhaps you should try some spelling variations:
van dang » van dong, van dung, van nang
ve triet » va trien, su triet
te sach » toc sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va dang » va nang, va lang, da dang
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 xa hoi. hieu va am thuc ((va dang) OR (van dang)) de 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 va am thuc ((va dang) OR (van dang)) de 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 va am thuc ((va dang) OR (van dang)) de ve triet".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te sach)) ky lang xa hoi. hieu va am thuc ((va dang) OR (van dang)) de ve triet*.