Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
cham cuu » cap cuu, chat cua
ky tang » ky dang, kho tang, ky trong
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
hanh ly » khanh ly, hanh ky, hang ly
cua tre » cua te, cuu tre, dua tren
cuu va » cuu van, cuu ve

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 (ky nang)) ma hoa. hieu ve cham cuu va hanh ly ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ky tang) OR (ky nang)) ma hoa. hieu ve cham cuu va hanh ly ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ky tang) or (ky nang)) ma hoa. hieu ve cham cuu va hanh ly ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: toc sach ((ky tang) or (ky nang)) ma hoa. hieu ve cham cuu va hanh ly ((cua tre) OR (cua triet))*.