Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
thuy van » thuy san, thuc van, chu van
cam thuy » cam thu, pham thuy, am thuc
hanh de » hanh ve, hanh kem
so sach » so sanh, bo sach, co sach
hieu va » hieu qua
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
de cua » le cua, te cua, dieu cua

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

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