Perhaps you should try some spelling variations:
than thien » tran thien, hoan thien, thua thien
tieu nhan » tiep nhan, tieu chuan, trien nhan
nhan kinh » than kinh, nha kinh, nhan sinh
cho luan » khoa luan, khao luan, cho phan
ket luan » ket qua, te luan, ket doan
dat luan » dan luan, dau luan, dat quang
tin » tinh
thieu » hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tin dung cho luan ((ket luan) or (dat luan)) tieu nhan kinh doanh ((than thien) OR (thanh thieu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tin dung cho luan ((ket luan) OR (dat luan)) tieu nhan kinh doanh ((than thien) OR (thanh thieu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tin dung cho luan ((ket luan) or (dat luan)) tieu nhan kinh doanh ((than thien) OR (thanh thieu))".
• Adding a wildcard symbol may retrieve word variants: tin dung cho luan ((ket luan) or (dat luan)) tieu nhan kinh doanh ((than thien) OR (thanh thieu))*.