Perhaps you should try some spelling variations:
cua triet » su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
cua viet » ca viet, hoa viet, cua vat
dau xua » dau cua, dao xuan, dau luan
xua van » xua va, qua van, cua van
nang xa » lang xa, nang ma, mang xa
van dau » van dao, phan dau
sach v » sach va, sach y, sach 2

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach v ((nang xa) OR (nang x)) hoi. hieu van dau xua van hanh tai ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach v ((nang xa) OR (nang x)) hoi. hieu van dau xua van hanh tai ((cua triet) OR (cua viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach v ((nang xa) OR (nang x)) hoi. hieu van dau xua van hanh tai ((cua triet) or (cua viet))*".