Perhaps you should try some spelling variations:
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
tinh cua » trinh cua, sinh cua, tinh chat
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
hieu ve » hieu van
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
ha hoi » hoa hoi, ha noi, xa hoi

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 ky lang ha hoi. ((hieu ve) OR (hieu va)) chat ((xuc va) or (thuc vat)) hanh tinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang ha hoi. ((hieu ve) OR (hieu va)) chat ((xuc va) OR (thuc vat)) hanh tinh cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang ha hoi. ((hieu ve) OR (hieu va)) chat ((xuc va) or (thuc vat)) hanh tinh cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang ha hoi. ((hieu ve) OR (hieu va)) chat ((xuc va) or (thuc vat)) hanh tinh cua tre*.