Perhaps you should try some spelling variations:
hang doanh » hanh doanh, nhung doanh, van doanh
doanh luan » doanh nhan
hoc tieng » hoc hien
hoc tien » hoc hien, hoc vien, hoc tren
luan ban » luan van, luan san, luan han
ban cong » bang cong, van cong, phan cong
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc tien) or (hoc tieng)) trinh - hang doanh luan ban cong ((dan than) or (anh tuan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc tien) OR (hoc tieng)) trinh - hang doanh luan ban cong ((dan than) OR (anh tuan)) tap.
• Adding a wildcard symbol may retrieve word variants: ((hoc tien) or (hoc tieng)) trinh - hang doanh luan ban cong ((dan than) or (anh tuan)) tap*.