Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
va triet » va thiet, va trien, ve triet
lang xa » lang ha, dang xay, lang van
qua cac » cua cac
cac luc » cau luc, coc luc, cac nuoc
van anh » van thanh, van minh
viec va » vien va, viec cua, viec lam
y lang » o lang, _ lang, tay lang
tuan » quan, tran, luan

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y lang xa hoi. hieu qua cac luc ((van anh) or (tuan anh)) viec va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y lang xa hoi. hieu qua cac luc ((van anh) OR (tuan anh)) viec va triet.
• Adding a wildcard symbol may retrieve word variants: toc sach y lang xa hoi. hieu qua cac luc ((van anh) or (tuan anh)) viec va triet*.