Perhaps you should try some spelling variations:
khoa tang » kho tang, khoa dang, khoa tieng
hieu cao » chieu cao, hieu cac, hieu ca
hoa dong » hoat dong, ha dong, hoa cong
cao chao » chao chao, cao chat, cao cho
mai hoi » mai khoi, dai hoi, lai hoi
tu ban » thu ban, te ban
vi cua » vai cua, di cua
tu san » thu san, tu can, vu san
xu ban » xuc ban, vu ban, xu bac
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ((khoa tang) or (hoa dong)) mai hoi. hieu cao chao ((xu ban) OR (tu ban)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ((khoa tang) OR (hoa dong)) mai hoi. hieu cao chao ((xu ban) OR (tu ban)) hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ((khoa tang) or (hoa dong)) mai hoi. hieu cao chao ((xu ban) OR (tu ban)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu san ((khoa tang) or (hoa dong)) mai hoi. hieu cao chao ((xu ban) OR (tu ban)) hanh vi cua te*.