Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
lang van » dang van, hoang van, giang van
tang van » dang van, hoang van, trong van
cua tre » cua te, cuu tre, cua triet
lan cac » dan cac, lan dac, gian cac
tuc ban » thuc ban, truc ban, tu ban
cac tuc » cac toc, cac tu, cac tac
thi lan » thi hanh, thi nang, thi lien
vi cua » vai cua, di cua
vu cac » tu cac, ve cac, vu cao

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

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