Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
cua tre » cua te, cuu tre, cua triet
nang tu » nang luc
nang du » nang luc, nang doc
hieu ve » hieu va, hieu van
van hoi » van hoa, van hoc, van hoe
ky lang » ky nang, ky dang, ky tang
ve cac » va cac, vien cac
sac ky » cac ky, sai ky
bac va » bac ha, bao va, tac va
tu sac » tu sach, tu cac, tu san

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

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