Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cua tre » cua te, cuu tre, dua tren
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
tuc va » thuc va, truc va, tuc xa

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