Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
hanh tai » thanh tai, hang tai, han tai
hanh lai » hanh lam, thanh lap, thanh loi
ve pham » vi pham, v pham, ve phan
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, mai doi
lai hoi » dai hoi, lai hoa, lai roi
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang ((mai hoi) OR (lai hoi)). hieu ve pham duc va ((hanh lai) or (hanh tai)) chau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((mai hoi) OR (lai hoi)). hieu ve pham duc va ((hanh lai) OR (hanh tai)) chau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((mai hoi) OR (lai hoi)). hieu ve pham duc va ((hanh lai) or (hanh tai)) chau triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((mai hoi) OR (lai hoi)). hieu ve pham duc va ((hanh lai) or (hanh tai)) chau triet*.