Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
va triet » va thiet, va trien, ve triet
te sach » toc sach
sang xa » song xa, lang xa, sang ma
hieu va » lieu va, hieu qua
lam xuc » lam duoc
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach _ sang xa hoi. hieu va ((lam xuc) OR (cam xuc)) van hanh dai ((cua tre) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach _ sang xa hoi. hieu va ((lam xuc) OR (cam xuc)) van hanh dai ((cua tre) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach _ sang xa hoi. hieu va ((lam xuc) OR (cam xuc)) van hanh dai ((cua tre) or (va triet))".
• Adding a wildcard symbol may retrieve word variants: te sach _ sang xa hoi. hieu va ((lam xuc) OR (cam xuc)) van hanh dai ((cua tre) or (va triet))*.