Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
va triet » va thiet, va trien, ve triet
lang xa » lang ha, dang xay, lang van
nam xua » nam cua, nam mua, nam qua
danh vi » hanh vi, danh di, danh va
dinh vi » dinh ve, dinh viet, dinh tri
thi van » thi lan, thi hanh, thi nang
o lang » hoa lang, hoi lang
xua va » xuat va, vua va, sua va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (thuoc sach)) o lang xa hoi. thi van nam xua va ((danh vi) OR (dinh vi)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) o lang xa hoi. thi van nam xua va ((danh vi) OR (dinh vi)) va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thuoc sach)) o lang xa hoi. thi van nam xua va ((danh vi) OR (dinh vi)) va triet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuoc sach)) o lang xa hoi. thi van nam xua va ((danh vi) OR (dinh vi)) va triet*.