Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh doi » thanh doi, hanh noi, hang doi
dang xay » dang van, van xay
doi cua » dai cua, hoi cua, dong cua
va hanh » van hanh, va thanh, va danh
cac tuc » cac toc, cac tac, cac nuoc
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac tu » cac thu, cach tu, cac du

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 (dang xay)) hoi. hieu ve ((cac tuc) OR (cac tu)) va hanh doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (dang xay)) hoi. hieu ve ((cac tuc) OR (cac tu)) va hanh doi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) or (dang xay)) hoi. hieu ve ((cac tuc) OR (cac tu)) va hanh doi cua triet*".