Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
sach nay » sach hay, sach vay, sach nang
va triet » va thiet, ve triet, cua triet
minh hai » minh khai, tinh hai, manh hai
va trien » va truyen, va thiet, va tuyen
nay lang » nam lang, tay lang, nhan lang
va minh » van minh, vua minh, va kinh
lang xa » lang ha, dang xay, lang van
ve cai » va cai, ve cac, ve tai
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc 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 nay lang xa hoi. hieu ((ve cai) or (va cam)) xuc va minh hai ((va triet) OR (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach nay lang xa hoi. hieu ((ve cai) OR (va cam)) xuc va minh hai ((va triet) OR (va trien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach nay lang xa hoi. hieu ((ve cai) or (va cam)) xuc va minh hai ((va triet) OR (va trien))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach nay lang xa hoi. hieu ((ve cai) or (va cam)) xuc va minh hai ((va triet) OR (va trien))*.