Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
duoc nuoc » duoc duoc, duoc cuoc, duoc quoc
hieu duoc » hiem duoc, hieu thuoc, hieu luc
hieu hieu » hien hieu, hieu hien, thien hieu
dinh vai » dinh van, dinh vi, dinh va
vai cua » dai cua, hai cua, lai cua
va dinh » van dinh, va kinh, va tinh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
nang xa » lang xa, mang xa, ang xa

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 ty ((((nang xa) OR (nang ma))) or (nang x)) hoi. hieu hieu duoc nuoc va dinh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((((nang xa) OR (nang ma))) OR (nang x)) hoi. hieu hieu duoc nuoc va dinh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((((nang xa) OR (nang ma))) or (nang x)) hoi. hieu hieu duoc nuoc va dinh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((((nang xa) OR (nang ma))) or (nang x)) hoi. hieu hieu duoc nuoc va dinh vai cua triet*.