Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc day » thuc dan, thuc vat
sach vu » sach va, sach tu, sach uu
thuc va » thuc vat, thuc dan
vu nang » vuc nang, va nang, vu dang
hanh de » hanh ve, hanh kem
su sach » so sach, vu sach
va hai » van hai, va chai, va khai
de cua » le cua, te cua, dieu cua
5 hoi » o hoi

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 vu nang ((5 hoi) or (xa hoi)). lieu va hai ((thuc va) OR (thuc day)) hanh de cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach vu nang ((5 hoi) OR (xa hoi)). lieu va hai ((thuc va) OR (thuc day)) hanh de cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach vu nang ((5 hoi) or (xa hoi)). lieu va hai ((thuc va) OR (thuc day)) hanh de cua triet*".