Perhaps you should try some spelling variations:
hoc trieu » hoc thieu, hoc dieu, hoc thiet
canh tran » canh tranh, hanh trang, banh trang
hoc tieu » hoc thieu, hoc dieu, hoc sieu
tran van » luan van
cong van » cong vang, song van, cong tan
cong san » cong tac
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc trieu) or (hoc tieu)) tinh - canh tran van dong ((cong van) OR (cong san)) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc trieu) OR (hoc tieu)) tinh - canh tran van dong ((cong van) OR (cong san)) phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc trieu) or (hoc tieu)) tinh - canh tran van dong ((cong van) OR (cong san)) phan dau".
• Adding a wildcard symbol may retrieve word variants: ((hoc trieu) or (hoc tieu)) tinh - canh tran van dong ((cong van) OR (cong san)) phan dau*.