Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
van hanh » van thanh, ban hanh, van anh
so dinh » do dinh, co dinh, so sinh
dinh ly » sinh ly, dinh le, trinh ly
ca viet » va viet, co viet, hoa viet
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
ve cam » ve cham, ve cac, va cam
ma hoi » mai hoi, xa hoi, ma hoa
vi ca » vit ca, li ca, va ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: so dinh ly nang ma hoi. hieu ((ve cam) or (va cac)) xuc ((van hanh) or (ban thanh)) vi ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so dinh ly nang ma hoi. hieu ((ve cam) OR (va cac)) xuc ((van hanh) OR (ban thanh)) vi ca viet.
• Adding a wildcard symbol may retrieve word variants: so dinh ly nang ma hoi. hieu ((ve cam) or (va cac)) xuc ((van hanh) or (ban thanh)) vi ca viet*.