Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
lang van » dang van, tang van, hoang van
tu sach » thu sach, su sach, te sach
va cham » va chat, va tham
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay
luy tre » luyen tre
xuc va » tuc va, luc va, xac va
vi luy » vi lua, vi luu

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