Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
thanh tai » thanh hai, thanh toan, doanh tai
van thanh » ban thanh, van tuan
va triet » va thiet, va trien, ve triet
hoc sach » hoc sinh, hoc cac, hoc anh
ky tang » ky nang, ky dang, kho tang
hieu ve » hieu va, hieu van
cam luc » cam xuc, cau luc
luc van » luoc van, luu van, duc van
ma hoi » mai hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam
tai va » thai va, mai va, tri va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (hoc sach)) ky tang ((ma hoi) OR (xa hoi)). hieu ve cam luc van thanh tai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (hoc sach)) ky tang ((ma hoi) OR (xa hoi)). hieu ve cam luc van thanh tai va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (hoc sach)) ky tang ((ma hoi) OR (xa hoi)). hieu ve cam luc van thanh tai va triet".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (hoc sach)) ky tang ((ma hoi) OR (xa hoi)). hieu ve cam luc van thanh tai va triet*.