Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh hoa » thanh pho
tan thanh » tran thanh, tang thanh, toan thanh
hieu van » hieu va, thien van, lieu va
dang xay » dang van, van xay
van lam » van nam
lam duc » lam duoc, pham duc, nam duoc
lang xa » lang ha, lang van
cua tre » cua te, cuu tre, dua tren
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y ((lang xa) OR (dang xay)) hoi. hieu van lam duc tan thanh hoa ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((lang xa) OR (dang xay)) hoi. hieu van lam duc tan thanh hoa ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((lang xa) OR (dang xay)) hoi. hieu van lam duc tan thanh hoa ((cua tre) or (cua triet))*".