Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
mai khoi » mai khoa, tai khoa, cac khoi
tinh dai » trinh dai, tinh da, tinh hai
te sach » toc sach
mai hoi » dai hoi, lai hoi, mai doi
hieu ve » hieu va, hieu van
va tinh » may tinh
cua tre » cua te, cuu tre, dua tren
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
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: te sach y nang ((mai hoi) OR (mai khoi)). hieu ve cam xuc va tinh dai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((mai hoi) OR (mai khoi)). hieu ve cam xuc va tinh dai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((mai hoi) OR (mai khoi)). hieu ve cam xuc va tinh dai ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((mai hoi) OR (mai khoi)). hieu ve cam xuc va tinh dai ((cua tre) or (cua triet))*.