Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
thanh lai » thanh hai, thanh lap, thanh loi
nam truoc » lam truoc, nam truong, nam trung
va triet » va thiet, va trien, ve triet
va thanh » gia thanh, ban thanh, va tinh
nam truc » nam thuc, nam trung, lam truoc
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang o » nang co, nang ho, nang ro
lai va » loai va, mai va, dai va
o lai » o lao

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