Perhaps you should try some spelling variations:
ban hanh » ban hang
voi hoat » toi hoat, doi hoat, vo hoat
van hanh » van thanh, van anh, van ban
nang mai » nang ma, nang tai, lang mai
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
mai hoi » mai khoi, dai hoi, lai hoi
voi hoa » voi khoa, boi hoa, voi ho
su sach » so sach, vu sach
ve cac » va cac, vien cac
y nang » ky nang, ly nang, v nang

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 y nang mai hoi. hieu ve cac xuc ((van hanh) OR (ban hanh)) ((voi hoa) or (voi hoat)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang mai hoi. hieu ve cac xuc ((van hanh) OR (ban hanh)) ((voi hoa) OR (voi hoat)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang mai hoi. hieu ve cac xuc ((van hanh) OR (ban hanh)) ((voi hoa) or (voi hoat)) viet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang mai hoi. hieu ve cac xuc ((van hanh) OR (ban hanh)) ((voi hoa) or (voi hoat)) viet*.