Perhaps you should try some spelling variations:
cua tre » cua te, cuu tre, cua triet
tinh va » tich va, trinh van, trinh vat
hieu va » lieu va, hieu qua
dang ha » dong ha, dung ha, lang ha
hieu ve » hieu van
ky dang » ky nang, ky danh
sai ky » sac ky
ha hoi » hoa hoi, ha noi, xa hoi
va cua » va chua, via cua, ca cua
su sai » su tai, su hai, su dai
tu xa » tu xay, te xa, tu ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ky dang ha hoi. ((hieu ve) OR (hieu va)) duoc ((tu xa) or (tu va)) tinh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky dang ha hoi. ((hieu ve) OR (hieu va)) duoc ((tu xa) OR (tu va)) tinh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ky dang ha hoi. ((hieu ve) OR (hieu va)) duoc ((tu xa) or (tu va)) tinh va cua tre".
• Adding a wildcard symbol may retrieve word variants: su sai ky dang ha hoi. ((hieu ve) OR (hieu va)) duoc ((tu xa) or (tu va)) tinh va cua tre*.