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

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