Perhaps you should try some spelling variations:
danh thanh » dinh thanh, dang thanh, nhanh thanh
nang caon » nang can, nang chon, nang co
thanh vi » hanh vi, thanh va, thanh ve
te sach » toc sach
cac dac » cac dan, cac dai, cac bac
cac duc » cac du, cao duc, cac nuoc
sach ty » sach y, sach tu, sach thu
cua cau » cua cac, cua chu, cua cay
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty ((nang cao) or (nang caon)) hoc. lieu va ((cac duc) OR (cac dac)) danh thanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang cao) OR (nang caon)) hoc. lieu va ((cac duc) OR (cac dac)) danh thanh vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang cao) or (nang caon)) hoc. lieu va ((cac duc) OR (cac dac)) danh thanh vi cua cau*".