Perhaps you should try some spelling variations:
danh doi » danh di, thanh doi, dung doi
cua tre » cua te, cuu tre, cua triet
doi cua » dai cua, hoi cua
hieu ve » hieu van
hieu va » lieu va, hieu qua
tuc va » thuc va, truc va, tuc xa
luc va » duc va, loc va
te sai » te tai, te bai, te lai
sai ky » sac ky
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky nang o hoi. ((hieu ve) or (hieu va)) cam ((luc va) OR (tuc va)) danh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky nang o hoi. ((hieu ve) OR (hieu va)) cam ((luc va) OR (tuc va)) danh doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ky nang o hoi. ((hieu ve) or (hieu va)) cam ((luc va) OR (tuc va)) danh doi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sai ky nang o hoi. ((hieu ve) or (hieu va)) cam ((luc va) OR (tuc va)) danh doi cua tre*.