Perhaps you should try some spelling variations:
cham hoc » cham soc, chat hoc, cham hoi
danh van » doanh van, dang van, dinh van
cau tren » cu tren, dau tren, ca tren
ky dang » ky nang, ky danh
ky tang » ky nang, kho tang, ky trong
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va danh » va dinh, va dan, va hanh
van cau » van dau, van hau, van chat
tu sac » tu sach, tu cac, tu san

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 dang) or (ky tang)) xa hoi. hieu ve cham hoc va danh van cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky dang) OR (ky tang)) xa hoi. hieu ve cham hoc va danh van cau tren.
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky dang) or (ky tang)) xa hoi. hieu ve cham hoc va danh van cau tren*.