Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
su triet » su viet, ve triet
manh hai » lanh hai, minh hai, thanh hai
thuoc va » thuc va, thuoc ma, thuong va
su sach » so sach, vu sach
va manh » van manh, va danh, va hanh
su tien » su kien, su hien, tu tieng
sach ly » sach y, sach lo, sach ty
hieu va » lieu va, hieu qua
ly nang » ky nang, ly hang, ly vang
ma hoi » mai hoi, xa hoi, me hoi
va lam » van lam, va lap

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 ly nang ((ma hoi) or (ma hoa)). hieu va lam thuoc va manh hai ((su triet) OR (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang ((ma hoi) OR (ma hoa)). hieu va lam thuoc va manh hai ((su triet) OR (su tien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly nang ((ma hoi) or (ma hoa)). hieu va lam thuoc va manh hai ((su triet) OR (su tien))".
• Adding a wildcard symbol may retrieve word variants: su sach ly nang ((ma hoi) or (ma hoa)). hieu va lam thuoc va manh hai ((su triet) OR (su tien))*.