Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van thanh » ban thanh, van tuan
cham cuu » cap cuu, chat cua
lang xa » lang ha, dang xay, lang van
hieu vu » hieu va, hieu ve, hieu su
te sach » toc sach
vu cham » va cham, vu kham, tu cham
y lang » o lang, _ lang, tay lang
va ve » va de, va vi, va vo
va le » va de, vu le

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 (te sach)) y lang xa hoi. hieu vu cham cuu van thanh ((va ve) OR (va le)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (te sach)) y lang xa hoi. hieu vu cham cuu van thanh ((va ve) OR (va le)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (te sach)) y lang xa hoi. hieu vu cham cuu van thanh ((va ve) OR (va le)) triet".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (te sach)) y lang xa hoi. hieu vu cham cuu van thanh ((va ve) OR (va le)) triet*.