Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
cuu tre » cua tre, cau treo
danh di » danh du, xanh di, danh dien
va danh » va dinh, va dan, va hanh
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
sac ky » cac ky, sai ky
tuc va » thuc va, truc va, tuc xa
vu sac » vu sach, vu san, va sac
x hoi » o hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ky nang ((x hoi) or (xa hoi)). hieu ve cam tuc va danh di ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang ((x hoi) OR (xa hoi)). hieu ve cam tuc va danh di ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky nang ((x hoi) or (xa hoi)). hieu ve cam tuc va danh di ((cuu tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: vu sac ky nang ((x hoi) or (xa hoi)). hieu ve cam tuc va danh di ((cuu tre) OR (cau tren))*.