Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
danh dau » lanh dao, hang dau, danh tu
va danh » va dinh, va dan, va hanh
cac tuc » cac toc, cac tu, cac tac
hieu va » lieu va, hieu qua
sach ky » sach y, sach ty, sach kem
dang xa » dang xay, lang xa, dang ha
tuc va » thuc va, truc va, tuc xa
sac ky » cac ky, sai ky
cua te » cua tu

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