Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh tai » thanh tai, hang tai, han tai
vat hanh » vat thanh, van hanh, va hanh
nang xa » nang x, lang xa, nang ma
sach ly » sach y, sach lo, sach hay
van cac » van cau, van bac, dan cac
van hac » van hoc, van ha, van hai
sach ty » sach y, sach tu, sach thu
tai cua » thai cua, tai cuc, tri cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ly) OR (sach ty)) nang xa hoi. hieu ((van cac) OR (van hac)) thuc vat hanh tai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ly) OR (sach ty)) nang xa hoi. hieu ((van cac) or (van hac)) thuc vat hanh tai cua triet~".
• Adding a wildcard symbol may retrieve word variants: su ((sach ly) OR (sach ty)) nang xa hoi. hieu ((van cac) or (van hac)) thuc vat hanh tai cua triet*.