Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
cua tre » cua te, cuu tre, dua tren
va hanh » van hanh, va thanh, va danh
cac xuc » cam xuc, cac nuoc, chat xuc
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
lang ha » long ha
van cac » van hac, van cau, van bac
xuc va » duc va, tuc va, luc va

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 y ((nang xa) or (lang ha)) hoi. hieu van cac xuc va hanh vai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (lang ha)) hoi. hieu van cac xuc va hanh vai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang xa) or (lang ha)) hoi. hieu van cac xuc va hanh vai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) or (lang ha)) hoi. hieu van cac xuc va hanh vai ((cua tre) OR (cua triet))*.