Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
hoc chieu » hoc thieu, ho chieu, hoc dieu
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than tap » toan tap, han tap, phan tap
hanh va » hang va, hanh vi
han va » hang va, nhan va, ban va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chieu) or (hoc hien)) xanh - hanh ((han va) OR (hanh va)) phuong cong ban than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (hoc hien)) xanh - hanh ((han va) OR (hanh va)) phuong cong ban than tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) or (hoc hien)) xanh - hanh ((han va) OR (hanh va)) phuong cong ban than tap".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (hoc hien)) xanh - hanh ((han va) OR (hanh va)) phuong cong ban than tap*.