Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc day » thuc dan, thuc vat
hanh dan » thanh dan, hanh san, canh dan
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
thuc va » thuc vat, thuc dan
dan cua » dan ca, ban cua, dai cua

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 ky nang xa hoi. ((thien van) OR (thi van)) am ((thuc va) or (thuc day)) hanh dan cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. ((thien van) OR (thi van)) am ((thuc va) OR (thuc day)) hanh dan cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. ((thien van) OR (thi van)) am ((thuc va) or (thuc day)) hanh dan cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. ((thien van) OR (thi van)) am ((thuc va) or (thuc day)) hanh dan cua triet*.