Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
dinh vi » dinh ve, dinh viet, dinh tri
va dinh » van dinh, va kinh, va tinh
va cham » va chat, va tham
co sach » cuon sach, hoc sach
bo sach » hoc sach
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua
va cam » va cac, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((co sach) OR (bo sach)) y nang ma hoi. lieu ((va cam) or (va cham)) tu va dinh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((co sach) OR (bo sach)) y nang ma hoi. lieu ((va cam) OR (va cham)) tu va dinh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((co sach) OR (bo sach)) y nang ma hoi. lieu ((va cam) or (va cham)) tu va dinh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: ((co sach) OR (bo sach)) y nang ma hoi. lieu ((va cam) or (va cham)) tu va dinh vi cua viet*.