Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
nhung cau » chung cu, nhung bai, nhu cau
hoc hieu » hoc hien, doc hieu, hoc dieu
cong cua » cong cu, dong cua, huong cua
cua nong » cua cong, cuu nong, cua dong
cong ban » cong bang, cong san, cong dan
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hieu) OR (hoc thieu)) quang - thanh cong cua nong ((cong ban) or (cong tan)) nhung cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc thieu)) quang - thanh cong cua nong ((cong ban) OR (cong tan)) nhung cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) OR (hoc thieu)) quang - thanh cong cua nong ((cong ban) or (cong tan)) nhung cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) OR (hoc thieu)) quang - thanh cong cua nong ((cong ban) or (cong tan)) nhung cau*.