Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, tu cach
tinh va » tich va, trinh van, trinh vat
va tinh » may tinh
ve chao » ve chat, ve cham, ve cho
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
va cua » va chua, via cua, ca cua
xu va » xu van, tu va, su va

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

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