Perhaps you should try some spelling variations:
ban hanh » ban hang
vien cac » vien bach, vien dai, vien da
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
ve cham » va cham, ve chat, vu cham
vai cua » dai cua, hai cua, lai cua
tuc ban » thuc ban, truc ban, tu ban
vi cua » di cua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky lang xa hoi. hieu ((ve cham) or (vien cac)) tuc ban hanh ((vi cua) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky lang xa hoi. hieu ((ve cham) OR (vien cac)) tuc ban hanh ((vi cua) OR (vai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky lang xa hoi. hieu ((ve cham) or (vien cac)) tuc ban hanh ((vi cua) or (vai cua)) tre*.