Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
van dinh » van minh, va dinh, xuan dinh
ve triet » va trien, su triet
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
x hoi » xa hoi, o hoi, x ho
cu ve » cuu ve, cua ve, cu 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) or (thuat sach)) y nang x hoi. hieu ve cam duc ((van dinh) OR (van dich)) cu ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thuat sach)) y nang x hoi. hieu ve cam duc ((van dinh) OR (van dich)) cu ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (thuat sach)) y nang x hoi. hieu ve cam duc ((van dinh) OR (van dich)) cu ve triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thuat sach)) y nang x hoi. hieu ve cam duc ((van dinh) OR (van dich)) cu ve triet*.