Perhaps you should try some spelling variations:
sach tham » sach nha
tham nang » nham nang, tham lang, tham nhung
hanh hai » thanh hai, nhanh hai, hang hai
va triet » va trien, ve triet, cua triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
va chat » van chat, va phat, cao chat
luc va » tuc va, loc va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tham nang xa hoi. lieu va chat ((luc va) or (duc va)) hanh hai ((va triet) OR (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tham nang xa hoi. lieu va chat ((luc va) OR (duc va)) hanh hai ((va triet) OR (va thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tham nang xa hoi. lieu va chat ((luc va) or (duc va)) hanh hai ((va triet) OR (va thiet))".
• Adding a wildcard symbol may retrieve word variants: tu sach tham nang xa hoi. lieu va chat ((luc va) or (duc va)) hanh hai ((va triet) OR (va thiet))*.