Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thinh » van thanh, van chinh, van minh
thinh le » trinh ly
cam luc » cam xuc, cau luc
cua tre » cua te, cuu tre, dua tren
luc van » luoc van, luu van, duc van
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
va cam » va cham, va cac, va cao

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