Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam duoc » nam thuoc, da duoc, dat duoc
hieu van » hieu va, thien van, lieu va
lam duoc » luat duoc, lam thuoc, tao duoc
cua tre » cua te, cuu tre, dua tren
dinh va » dinh van, dinh ve, tinh va
va dinh » van dinh, va kinh, va tinh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang

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 van ((lam duoc) OR (nam duoc)) va dinh va ((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 van ((lam duoc) OR (nam duoc)) va dinh va ((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 van ((lam duoc) OR (nam duoc)) va dinh va ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu van ((lam duoc) OR (nam duoc)) va dinh va ((cua tre) or (cua triet))*.