Perhaps you should try some spelling variations:
thien van » thi van
cua viet » ca viet, hoa viet, cua dieu
sach lo » sach dao, sach doi, sach hoi
sach ly » sach y, sach ty, sach hay
van lam » van nam
lam luc » lao luc, lam duoc
va dinh » van dinh, va kinh, va tinh
dinh di » dinh du, dinh vi, danh di
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach ly) OR (sach lo)) nang x hoi. thien van lam luc va dinh di ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ly) OR (sach lo)) nang x hoi. thien van lam luc va dinh di ((cua viet) OR (cua vat))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ly) OR (sach lo)) nang x hoi. thien van lam luc va dinh di ((cua viet) or (cua vat))*".