Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doanh van » doan van, doanh va, doanh ban
va doanh » van doanh, vay doanh, va danh
toc sach » hoc sach, doc sach, thuoc sach
kho tang » cao tang
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
ky tang » ky nang, ky dang, ky trong
cua tre » cua te, cuu tre, dua tren
tuc va » thuc va, truc va, tuc xa
ve cac » va cac, vien cac

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 ((ky tang) or (kho tang)) ma hoa. hieu ve cac tuc va doanh van ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ky tang) OR (kho tang)) ma hoa. hieu ve cac tuc va doanh van ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ky tang) or (kho tang)) ma hoa. hieu ve cac tuc va doanh van ((cua tre) OR (cua triet))*".