Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
hanh ca » hanh cac, hanh cat, hanh cua
luc van » luoc van, luu van, duc van
nang xa » nang x, lang xa, nang ma
sach va » sach xa, sach ha, sach dao
sach v » sach y, sach 2, sach vay
va cam » va cham, va cac, va cao
ca cua » co cua
ve cai » va cai, ve cac, ve tai

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 v) OR (sach va)) nang xa hoi. hieu ((ve cai) or (va cam)) luc van hanh ca cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach v) OR (sach va)) nang xa hoi. hieu ((ve cai) OR (va cam)) luc van hanh ca cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach v) OR (sach va)) nang xa hoi. hieu ((ve cai) or (va cam)) luc van hanh ca cua triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach v) OR (sach va)) nang xa hoi. hieu ((ve cai) or (va cam)) luc van hanh ca cua triet*.