Perhaps you should try some spelling variations:
ve triet » va trien, su triet
va hanh » van hanh, va thanh, va danh
sach ky » sach y, sach ty, sach kem
hieu va » lieu va, hieu qua
sang xa » song xa, lang xa, sang ma
cac tuc » cac toc, cac tu, cac tac
sac ky » cac ky, sai ky
va dan » ca dan, va dao, va dau
vi ve » va ve, gi ve, ve ve

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ky) OR (sac ky)) sang xa hoi. hieu va cac tuc ((va hanh) OR (va dan)) vi ve triet~.
• Adding a wildcard symbol may retrieve word variants: vu ((sach ky) or (sac ky)) sang xa hoi. hieu va cac tuc ((va hanh) or (va dan)) vi ve triet*.