Perhaps you should try some spelling variations:
hanh bai » thanh bai, anh bai, hinh bai
sang tao » hang tai
van hanh » van thanh, ban hanh, van anh
nam thuc » nam thuoc, am thuc, nam thu
su sach » so sach, vu sach
cam tuc » cam xuc, cam tu, dam thuc
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
tang ma » mang may, tang van
ca viet » va viet, co viet, hoa viet

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty ((sang tao) or (tang ma)) hoi. hieu ve ((cam tuc) or (nam thuc)) van hanh bai ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((sang tao) OR (tang ma)) hoi. hieu ve ((cam tuc) OR (nam thuc)) van hanh bai ca viet.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((sang tao) or (tang ma)) hoi. hieu ve ((cam tuc) or (nam thuc)) van hanh bai ca viet*.