Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thanh vi » thanh va, thanh ve, nhanh vi
lang van » dang van, tang van, hoang van
tuc ban » thuc ban, truc ban, tu ban
cac tuc » cac toc, cac tu, cac tac
van cac » van hac, van cau, van bac
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay
cua tre » cua te, cuu tre, cua triet

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 ky ((lang xa) or (lang van)) hoi. hieu van cac tuc ban ((thanh vi) OR (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky ((lang xa) OR (lang van)) hoi. hieu van cac tuc ban ((thanh vi) OR (hanh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky ((lang xa) or (lang van)) hoi. hieu van cac tuc ban ((thanh vi) OR (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ky ((lang xa) or (lang van)) hoi. hieu van cac tuc ban ((thanh vi) OR (hanh vi)) cua tre*.