Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
nang xa » lang xa, nang ma, mang xa
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
tu can » tu ban, tu cac, thu canh
tu cua » hu cua, vu cua
dan va » doan va, dan ca, ban va

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 x)) hoi. hieu van nam ((tu can) OR (tu cua)) dan va su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) OR (nang x)) hoi. hieu van nam ((tu can) OR (tu cua)) dan va su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) OR (nang x)) hoi. hieu van nam ((tu can) OR (tu cua)) dan va su triet*.