Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dan hanh » dang hanh, dan khanh, dan thanh
thuc dan » thuc hanh, hoc dan, thuc vat
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach y, sach vay
ve nam » he nam, va nam, te nam
le nam » ly nam, he nam, le na
sach 2 » sach y
vi cua » vai cua, di cua

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 2)) nang xa hoi. hieu ((ve nam) OR (le nam)) thuc dan hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach v) OR (sach 2)) nang xa hoi. hieu ((ve nam) OR (le nam)) thuc dan hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach v) or (sach 2)) nang xa hoi. hieu ((ve nam) OR (le nam)) thuc dan hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach v) or (sach 2)) nang xa hoi. hieu ((ve nam) OR (le nam)) thuc dan hanh vi cua triet*.