Perhaps you should try some spelling variations:
sieu viet » su viet, dien viet, bien viet
dao sieu » dao hieu, dau sieu, dao chieu
hanh dao » lanh dao, thanh dat, thanh dam
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
sach ty » sach y, sach tu, sach thu
tuc van » thuc van, truc van, tuc va
tu sach » thu sach, su sach, te sach
hieu vo » hieu voi, hieu va, hieu ve
canh xa » canh va, canh tac, canh tay
danh xa » danh ca, dinh xa, dan xa
co tuc » co thuc, co tu, co toc

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 ((danh xa) or (canh xa)) hoi. ((hieu vo) or (hieu van)) co tuc van hanh dao sieu viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((danh xa) OR (canh xa)) hoi. ((hieu vo) OR (hieu van)) co tuc van hanh dao sieu viet*.