Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su triet » su tien, ve triet
van hanh » van thanh, ban hanh, van anh
lang van » dang van, tang van, hoang van
nam tuc » nam thuc, nam truc, nam tu
hanh oi » hanh noi, hanh moi, hanh voi
tuc van » thuc van, truc van, tuc va
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
su viet » so viet

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((nang xa) or (lang van)) hoi. hieu van nam tuc van hanh oi ((su triet) OR (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (lang van)) hoi. hieu van nam tuc van hanh oi ((su triet) OR (su viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) or (lang van)) hoi. hieu van nam tuc van hanh oi ((su triet) OR (su viet))*".