Perhaps you should try some spelling variations:
truan doi » truyen doi, quan doi, khuan doi
te cach » ve cach, te sach, tu cach
tuan di » tuan do, quan doi, luan doi
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
cach tu » cach thuc
hieu va » lieu va, hieu qua
cho hoc » khoa hoc
tu nang » tru nang, tu nong, tu nano
cua chu » sua chua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cach tu nang ((cho hoc) or (co hoc)). hieu va cac xuc van ((tuan di) OR (truan doi)) cua chu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cach tu nang ((cho hoc) OR (co hoc)). hieu va cac xuc van ((tuan di) OR (truan doi)) cua chu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cach tu nang ((cho hoc) or (co hoc)). hieu va cac xuc van ((tuan di) OR (truan doi)) cua chu*".