Perhaps you should try some spelling variations:
bien viet » dien viet, tieng viet, trien viet
sieu viet » su viet, dien viet, viet viet
hanh dao » lanh dao, thanh dat, thanh dam
van hanh » van thanh, ban hanh, van anh
tuc van » thuc van, truc van, tuc va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua co » cua bo, cua cong
qua co » qua con, qua ca, qua cu

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 lang xa hoi. hieu ((qua co) OR (cua co)) tuc van hanh dao ((sieu viet) or (bien viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu ((qua co) OR (cua co)) tuc van hanh dao ((sieu viet) OR (bien viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu ((qua co) OR (cua co)) tuc van hanh dao ((sieu viet) or (bien viet))".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu ((qua co) OR (cua co)) tuc van hanh dao ((sieu viet) or (bien viet))*.