Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
cua trong » cua truong, cua trung, qua trong
cong tuan » cong luan, cong thanh, cong quang
hoc hieu » hoc hien, doc hieu, hoc dieu
cong cua » cong cu, dong cua, huong cua
cong tan » cong tac, cong san, cong thanh
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 hieu) OR (hoc thieu)) manh - thanh cong cua trong ((cong tuan) or (cong tan)) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc thieu)) manh - thanh cong cua trong ((cong tuan) OR (cong tan)) phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) OR (hoc thieu)) manh - thanh cong cua trong ((cong tuan) or (cong tan)) phan dau".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) OR (hoc thieu)) manh - thanh cong cua trong ((cong tuan) or (cong tan)) phan dau*.