Perhaps you should try some spelling variations:
luan hieu » luan tieu, luan thiet, van hieu
cho giang » chong giang, ha giang, cho giao
luan dieu » luan tieu, lan dieu, cua dieu
pho gian » pho giao, thoi gian, ho gia
qua tieu » luan tieu
dieu cua » dieu tra
dan luan » doanh luan, dung luan, tang luan
khoe dan » khoe ban, khoa dang, khoe dinh
qua dieu » cua dieu, quan dien, va dieu
van kien » van tien, van hien, van chien
phoi cay » nuoi cay, phoi tai, cho cay
hieu tra » dieu tra, hiep tran, chieu tro
tap cua » tap quan, tiep cua
cua tap » cua tam, cua phap
cap cua » cap cuu, ca cua, cau cua
thuc » thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((pho gian) OR (cho giang)) van kien thuc ) or ((((( pho cap cua tap cua ) or ( phoi cay ((qua dieu) or (qua tieu)) cua ))) or ((( khoe dan luan dieu cua ) or ( khoe dan luan hieu tra ))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((pho gian) OR (cho giang)) van kien thuc ) OR ((((( pho cap cua tap cua ) OR ( phoi cay ((qua dieu) OR (qua tieu)) cua ))) OR ((( khoe dan luan dieu cua ) OR ( khoe dan luan hieu tra ))))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((pho gian) OR (cho giang)) van kien thuc ) or ((((( pho cap cua tap cua ) or ( phoi cay ((qua dieu) or (qua tieu)) cua ))) or ((( khoe dan luan dieu cua ) or ( khoe dan luan hieu tra ))))))*".