Perhaps you should try some spelling variations:
dien cua » dieu cua, dien cuc, dien cu
te sach » toc sach
va tinh » may tinh
hieu va » lieu va, hieu qua
sach va » sach xa, sach ha, sach dao
hieu vu » hieu ve, hieu su, dieu vu
nang xa » lang xa, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet
soc va » hoc va, loc va, doc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach va ((nang xa) OR (nang x)) hoi. ((hieu vu) or (hieu va)) cham soc va tinh dien cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach va ((nang xa) OR (nang x)) hoi. ((hieu vu) OR (hieu va)) cham soc va tinh dien cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach va ((nang xa) OR (nang x)) hoi. ((hieu vu) or (hieu va)) cham soc va tinh dien cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach va ((nang xa) OR (nang x)) hoi. ((hieu vu) or (hieu va)) cham soc va tinh dien cua tre*.