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 » thien van, lieu va, hieu ve
danh vai » danh sai, danh va, doanh van
cua tre » cua te, cuu tre, dua tren
ma danh » va danh, ma dan, mo danh
duoc ma » duoc lam
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
ky lang » ky nang, ky dang, ky tang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. ((hieu van) OR (hieu va)) nam duoc ma danh vai ((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) or (hieu va)) nam duoc ma danh vai ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. ((hieu van) or (hieu va)) nam duoc ma danh vai ((cua tre) OR (cua triet))*.