Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vuc nang » cuc nang, chuc nang, van nang
hanh de » hanh ve, hanh kem
va hanh » van hanh, va thanh, va danh
hai tuc » thai tuc, hai cuc, thai thuc
su sach » so sach, vu sach
vu nang » va nang, vu dang, v nang
va hai » van hai, va chai, va khai
tuc va » thuc va, truc va, tuc xa
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) OR (vuc nang)) ((5 hoi) or (xa hoi)). lieu va hai tuc va hanh de cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((vu nang) OR (vuc nang)) ((5 hoi) OR (xa hoi)). lieu va hai tuc va hanh de cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((vu nang) OR (vuc nang)) ((5 hoi) or (xa hoi)). lieu va hai tuc va hanh de cua triet*".