Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cham tuc » nham thuc, pham thuc, tham thuc
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
so sach » so sanh, bo sach, co sach
tuc van » thuc van, truc van, tuc va
hanh oi » hanh noi, hanh moi, hanh voi
su sach » vu sach
oi su » ki su, vi su

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

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