Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
tinh lam » trinh lam, dinh lam, tinh lao
van chat » cao chat
cao hoi » cau hoi, co hoi, cao hoc
su sach » so sach, vu sach
va cham » va chat, va tham
va tinh » may tinh
lam cua » nam cua, lam chat
tu sach » thu sach, te sach, tu cach
soc va » hoc va, loc va, doc 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 (su sach)) ky nang cao hoi. thien ((van chat) or (va cham)) soc va tinh lam cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang cao hoi. thien ((van chat) OR (va cham)) soc va tinh lam cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky nang cao hoi. thien ((van chat) or (va cham)) soc va tinh lam cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky nang cao hoi. thien ((van chat) or (va cham)) soc va tinh lam cua viet*.