Perhaps you should try some spelling variations:
thanh va » thanh van, hanh va, thanh ha
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va cham » va chat, va tham
duy tre » duc tre, duy tri, duy tue
y lang » o lang, _ lang, tay lang
xuc va » tuc va, xac va
luc va » tuc va, loc va
va duy » van duy, va du, ta duy

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 y lang xa hoi. hieu va cham ((((xuc va) OR (luc va))) or (duc va)) thanh va duy tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. hieu va cham ((((xuc va) OR (luc va))) OR (duc va)) thanh va duy tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. hieu va cham ((((xuc va) OR (luc va))) or (duc va)) thanh va duy tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu va cham ((((xuc va) OR (luc va))) or (duc va)) thanh va duy tre*.