Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
su triet » su viet, su tien
ve triet » va trien
sach ty » sach y, sach tu, sach thu
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
va lam » van lam, va lap

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 ty lang xa hoi. lieu va lam ((luc van) OR (duc van)) hang va ((su triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty lang xa hoi. lieu va lam ((luc van) OR (duc van)) hang va ((su triet) OR (ve triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty lang xa hoi. lieu va lam ((luc van) OR (duc van)) hang va ((su triet) or (ve triet))*".