Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang cau » nang cao, hang cau, nang dau
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
van cau » van dau, van hau, van chat
hanh ca » hanh cac, hanh cat, hanh cua
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
ca cua » co cua

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 ky nang cau hoi. hieu van cau ((xuc va) or (tuc va)) hanh ca cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang cau hoi. hieu van cau ((xuc va) OR (tuc va)) hanh ca cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang cau hoi. hieu van cau ((xuc va) or (tuc va)) hanh ca cua triet*.