Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuoc ban » thuoc tan, thuoc dang, thu ban
nam thuoc » nam thuc, nam thu, nha thuoc
lang hoa » hang hoa, lang ha, nang hoa
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
hieu he » hiem he, hieu le, hieu hien
vai cua » dai cua, hai cua, lai cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu van
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky lang » ky nang, ky dang, ky tang
hieu va » lieu va, hieu qua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky lang hoa hoi. ((((hieu ve) OR (hieu va))) or (hieu he)) nam thuoc ban hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang hoa hoi. ((((hieu ve) OR (hieu va))) OR (hieu he)) nam thuoc ban hanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang hoa hoi. ((((hieu ve) OR (hieu va))) or (hieu he)) nam thuoc ban hanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang hoa hoi. ((((hieu ve) OR (hieu va))) or (hieu he)) nam thuoc ban hanh vai cua triet*.