Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam thuoc » nam thuc, nam thu, nha thuoc
thanh vi » hanh vi, thanh va, thanh ve
xa thanh » va thanh, ha thanh, ta thanh
nam truc » nam truoc, nam thuc, nam trung
nang hoa » nang hoat, hang hoa, nang hoc
sach ky » sac ky, sach y, sach ty
nang ha » nang hai, nang han, lang ha
tu sach » thu sach, su sach, te sach
vi cua » vai cua, di cua

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 ky ((nang ha) OR (nang hoa)) hoi. lieu va ((nam truc) or (nam thuoc)) xa thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang ha) OR (nang hoa)) hoi. lieu va ((nam truc) OR (nam thuoc)) xa thanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang ha) OR (nang hoa)) hoi. lieu va ((nam truc) or (nam thuoc)) xa thanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang ha) OR (nang hoa)) hoi. lieu va ((nam truc) or (nam thuoc)) xa thanh vi cua triet*.