Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
bach xuc » bach tuoc, bach xuan, bach hue
van hanh » van thanh, ban hanh, van ban
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
van anh » van thanh, tuan anh, van minh
cua tre » cua te, cuu tre, cua triet
tu ban » thu ban, te ban
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ban ((ky lang) or (ky tang)) xa hoi. hieu vien bach xuc ((van hanh) OR (van anh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ban ((ky lang) OR (ky tang)) xa hoi. hieu vien bach xuc ((van hanh) OR (van anh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ban ((ky lang) or (ky tang)) xa hoi. hieu vien bach xuc ((van hanh) OR (van anh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ban ((ky lang) or (ky tang)) xa hoi. hieu vien bach xuc ((van hanh) OR (van anh)) vi cua tre*.