Perhaps you should try some spelling variations:
hoc thiet » hoc thieu, hoc thuyet, hoc hien
thiet anh » thien anh, thuyet anh, thien danh
tranh cua » doanh cua, manh cua
cua trung » cua truong, xuan trung, cua nhung
cong van » cong vang, song van, cong tan
cong san » cong tac
luan ban » luan van, luan san, luan han

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet anh - canh tranh cua trung ((cong van) OR (cong san)) luan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet anh - canh tranh cua trung ((cong van) OR (cong san)) luan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thiet anh - canh tranh cua trung ((cong van) OR (cong san)) luan ban*.