Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
hang cong » dang cong, hang nong, bang cong
doan phan » doanh phan, toan phan, dan phan
ho chieu » theo chieu, doi chieu, mot chieu
tranh va » tranh van, trang va, trinh va
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (hoc thieu)) xanh - canh tranh va ((dung cong) or (hang cong)) doan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - canh tranh va ((dung cong) OR (hang cong)) doan phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) xanh - canh tranh va ((dung cong) or (hang cong)) doan phan cac".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) xanh - canh tranh va ((dung cong) or (hang cong)) doan phan cac*.