Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
van pham » san pham, van phan, van tham
van phat » va phat, van chat, van phan
van hanh » ban hanh, van anh, van ban
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
lam cua » nam cua, lam chat
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 ky nang x hoi. hieu ((van pham) OR (van phat)) duy ((van hanh) or (van thanh)) lam cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu ((van pham) OR (van phat)) duy ((van hanh) OR (van thanh)) lam cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu ((van pham) OR (van phat)) duy ((van hanh) or (van thanh)) lam cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ((van pham) OR (van phat)) duy ((van hanh) or (van thanh)) lam cua viet*.