Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
manh dinh » manh binh, manh tinh, anh dinh
va triet » va thiet, va trien, ve triet
duc manh » suc manh, duc anh, duc minh
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
dinh cu » dinh cuu, dinh chuc, dinh chau
tu sach » thu sach, su sach, te sach
ve cam » ve cham, ve cac, va cam
y nang » ky nang, ly nang, v nang
x hoi » o hoi, x ho, 5 hoi
cu va » cuu va, tu va, su va

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) or (thuat sach)) y nang ((x hoi) OR (xa hoi)). hieu ve cam duc manh dinh cu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) y nang ((x hoi) OR (xa hoi)). hieu ve cam duc manh dinh cu va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuat sach)) y nang ((x hoi) OR (xa hoi)). hieu ve cam duc manh dinh cu va triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) y nang ((x hoi) OR (xa hoi)). hieu ve cam duc manh dinh cu va triet*.