Perhaps you should try some spelling variations:
tinh dai » trinh dai, tinh da, tinh hai
te sach » toc sach
va tinh » may tinh
truc va » thuc va, thuc vat, trung va
sach ty » sach y, sach tu, sach thu
lang xa » dang xay, lang van
lang ha » long ha
cua tre » cua te, cuu tre, cua triet
va cai » va cac, va bai, va dai
va cao » va cac, va co, va dao

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 ty ((lang xa) OR (lang ha)) hoi. hieu ((va cai) or (va cao)) truc va tinh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((lang xa) OR (lang ha)) hoi. hieu ((va cai) OR (va cao)) truc va tinh dai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((lang xa) OR (lang ha)) hoi. hieu ((va cai) or (va cao)) truc va tinh dai cua tre*".