Perhaps you should try some spelling variations:
hoc doanh » hoa doanh, hoc danh, hoc dan
doanh hoa » doanh khoa, doanh hoan, danh hoa
cac thoi » cac toi, cac hop, cac tro
thoi tap » toi tap, hoc tap, thoi dai
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
phap tai » pham tai, phap thi, phap tang
hoa xan » hoa dan, hoa van, hoa han

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac thoi tap, nghien cuu dong hoc doanh hoa hoc ma ((hoa xa) or (hoa xan)) phap tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac thoi tap, nghien cuu dong hoc doanh hoa hoc ma ((hoa xa) OR (hoa xan)) phap tai.
• Adding a wildcard symbol may retrieve word variants: tu cac thoi tap, nghien cuu dong hoc doanh hoa hoc ma ((hoa xa) or (hoa xan)) phap tai*.