Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
va triet » va thiet, va trien, ve triet
van dinh » van minh, van dich, va dinh
ve cham » va cham, ve chat, vu cham
dinh cu » dinh cuu, dinh chuc, dinh chau
duc van » duc va, duc tan, duc manh
tu sach » thu sach, su sach, te sach
ve cam » ve cac, va cam, ve cai
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho
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. hieu ((ve cam) OR (ve cham)) duc van 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. hieu ((ve cam) OR (ve cham)) duc van 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. hieu ((ve cam) OR (ve cham)) duc van dinh cu va triet*".