Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
va cham » va chat, va tham
hanh le » thanh le, hanh ve, hanh de
y nang » ky nang, ly nang, v nang
doc va » duoc va, duc va, loc va
le cua » ly cua
x hoi » xa hoi, o hoi, x ho

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 x hoi. lieu va cham ((doc va) or (hoc va)) hanh le cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. lieu va cham ((doc va) OR (hoc va)) hanh le cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. lieu va cham ((doc va) or (hoc va)) hanh le cua viet*.