Perhaps you should try some spelling variations:
cua tre » cua te, cuu tre, cua triet
cau luc » cau truc, cau phuc
ky lang » ky dang, ky tang, tay lang
hieu ve » hieu van
tinh va » tich va, trinh van, trinh vat
va tinh » may tinh
hieu va » lieu va, hieu qua
va cua » va chua, via cua, ca cua
luc va » duc va, tuc va, loc va
vu sac » vu sach, vu san, va sac

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 lang) or (ky nang)) xa hoi. ((hieu ve) OR (hieu va)) cau luc va tinh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ((ky lang) OR (ky nang)) xa hoi. ((hieu ve) OR (hieu va)) cau luc va tinh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ((ky lang) or (ky nang)) xa hoi. ((hieu ve) OR (hieu va)) cau luc va tinh va cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sac ((ky lang) or (ky nang)) xa hoi. ((hieu ve) OR (hieu va)) cau luc va tinh va cua tre*.