Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
trinh van » trinh han, trinh quan, trinh toan
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
trinh va » trinh vat, trinh ve, trinh vi
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
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: ((theo chieu) OR (doc hieu)) xanh - canh ((trinh va) OR (trinh van)) dung cong dan phan cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (doc hieu)) xanh - canh ((trinh va) OR (trinh van)) dung cong dan phan cac".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (doc hieu)) xanh - canh ((trinh va) OR (trinh van)) dung cong dan phan cac*.