Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu hien » bieu hien, dieu hien, chieu chien
thuc van » thuc vat, thuc dan, thuc va
cac thuc » cach thuc, cac thu, can thuc
hien cac » thien cac, vien cac, hieu cac
ly nang » ky nang, ly hang, ly vang
hang di » hang doi, hang vi, hang dien
so sach » so sanh, bo sach, co sach
y nang » ky nang, v nang, may nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((y nang) OR (ly nang)) xa hoi. hieu hien cac thuc van ((hang di) or (hanh vi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((y nang) OR (ly nang)) xa hoi. hieu hien cac thuc van ((hang di) OR (hanh vi)) cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((y nang) OR (ly nang)) xa hoi. hieu hien cac thuc van ((hang di) or (hanh vi)) cua triet*".