Perhaps you should try some spelling variations:
hanh voi » hanh vi, hanh noi, hanh moi
van hanh » van thanh, ban hanh, van anh
nang mai » nang ma, nang tai, lang mai
mai khoa » tai khoa, may khoa, dai khoa
voi hoa » voi hoat, voi khoa, boi hoa
xuc van » duc van, luc van, vuc van
su sach » so sach, vu sach
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
su sac » su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) OR (su sach)) ky nang mai khoa. hieu ((ve cam) or (va cam)) xuc van hanh voi hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su sach)) ky nang mai khoa. hieu ((ve cam) OR (va cam)) xuc van hanh voi hoa viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) OR (su sach)) ky nang mai khoa. hieu ((ve cam) or (va cam)) xuc van hanh voi hoa viet".
• Adding a wildcard symbol may retrieve word variants: ((su sac) OR (su sach)) ky nang mai khoa. hieu ((ve cam) or (va cam)) xuc van hanh voi hoa viet*.