Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thu hoach
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
dan den » ban den, dan dung, quan den
van den » van de, van der, ban den
hieu le » hieu ve, hieu he, hieu ly
le cap » le cau
cuu va » cuu van, cuu ve

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)) ky tang xa hoi. hieu le cap cuu va ((dan den) OR (van den)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) ky tang xa hoi. hieu le cap cuu va ((dan den) OR (van den)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thuoc sach)) ky tang xa hoi. hieu le cap cuu va ((dan den) OR (van den)) cua triet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuoc sach)) ky tang xa hoi. hieu le cap cuu va ((dan den) OR (van den)) cua triet*.