Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
sach nay » sach hay, sach vay, sach nang
manh hai » lanh hai, minh hai, thanh hai
ve triet » va trien, su triet
nay lang » nam lang, tay lang, nhan lang
xuc van » duc van, luc van, xuc ban
vuc van » duc van, luc van, thuc van
lang xa » lang ha, dang xay, lang van
ve cai » va cai, ve cac, ve tai
va cam » va cham, va cac, va cao
hai ve » hoai ve, hai va, hai vu

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 van) OR (vuc van)) manh hai ve triet~.
• 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 van) OR (vuc van)) manh hai ve triet*.
• 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 van) OR (vuc van)) manh hai ve triet*".