Perhaps you should try some spelling variations:
cang thang » cong thanh, dang thanh
hoc thiet » hoc thuyet, hoc hien, toc thieu
hoc thieu » toc thieu, hoc hien
canh tran » canh tranh, hanh trang, banh trang
dong cang » dong bang, dong cong, dong cung
thang ban » hang ban, tang ban, thanh ban
tran van » luan van
ban can » ban dan, ban hang, ban hanh

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) or (hoc thieu)) tach - canh tran van dong cang thang ban can~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (hoc thieu)) tach - canh tran van dong cang thang ban can*.