Perhaps you should try some spelling variations:
dua tren » dung tren
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
ban hang » ngan hang
va danh » va dinh, va dan, va hanh
cuu tre » cua tre, cau tren, cau treo
tu cam » tu cham, tu cac, tu nam
cam ky » cao ky, cac ky
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cam ky nang x hoi. hieu van cham soc ((ban hang) or (va danh)) di ((cuu tre) or (dua tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cam ky nang x hoi. hieu van cham soc ((ban hang) OR (va danh)) di ((cuu tre) OR (dua tren)).
• Adding a wildcard symbol may retrieve word variants: tu cam ky nang x hoi. hieu van cham soc ((ban hang) or (va danh)) di ((cuu tre) or (dua tren))*.