Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
vu sach » vu bach, su sach, vu khach
tinh ca » tinh cao, tinh cua, tinh va
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay
cua tre » cua te, cuu tre, cua triet
va coc » va cuoc, va cac, va hoc
loc va » hoc va, luc va
ca cua » co cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty ((lang xa) or (lang van)) hoi. hieu va coc ((loc va) or (duc va)) tinh ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty ((lang xa) OR (lang van)) hoi. hieu va coc ((loc va) OR (duc va)) tinh ca cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ty ((lang xa) or (lang van)) hoi. hieu va coc ((loc va) or (duc va)) tinh ca cua tre*.