Perhaps you should try some spelling variations:
hoc chieu » hoc thieu, hoc hien, hoc dieu
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
tuong va » truong va, thuong va, luong va
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban
tung va » trung va, dung va, vung 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 (ho chieu)) xanh - manh ((tung va) OR (tuong va)) dung cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (ho chieu)) xanh - manh ((tung va) OR (tuong va)) dung cong dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) or (ho chieu)) xanh - manh ((tung va) OR (tuong va)) dung cong dan toan ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (ho chieu)) xanh - manh ((tung va) OR (tuong va)) dung cong dan toan ban*.