Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thien van » thi van
hanh dan » thanh dan, hanh san, canh dan
thuc day » thuc dan, thuc vat
thuc va » thuc vat, thuc dan
dan cua » dan ca, ban cua, dai cua
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
van am » van nam, van lam, van dam

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) OR (sac ky)) nang xa hoi. thien 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) OR (sac ky)) nang xa hoi. thien 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) OR (sac ky)) nang xa hoi. thien van am ((thuc va) or (thuc day)) hanh dan cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) nang xa hoi. thien van am ((thuc va) or (thuc day)) hanh dan cua triet*.