Perhaps you should try some spelling variations:
thanh chac » thanh cac, thanh cham, thanh chau
thanh cha » thanh ha, thanh nha, thanh phan
lang van » dang van, tang van, hoang van
cua tre » cua te, cuu tre, cua triet
van hoi » van hoa, van hoc, van hoe
hieu ve » hieu va, hieu van
cac luc » cau luc, coc luc, cac nuoc
luc va » duc va, tuc va, loc va
sac ky » cac ky
ve cac » va cac, vien 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 ((sac ky) OR (sai ky)) lang van hoi. hieu ve cac luc va ((thanh cha) or (thanh chac)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sac ky) OR (sai ky)) lang van hoi. hieu ve cac luc va ((thanh cha) OR (thanh chac)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sac ky) OR (sai ky)) lang van hoi. hieu ve cac luc va ((thanh cha) or (thanh chac)) cua tre*".