Perhaps you should try some spelling variations:
hoc trieu » hoc thieu, hoc tieu, hoc dieu
trinh van » trinh han, trinh quan, trinh toan
dang cong » dung cong
trinh va » trinh vat, trinh ve, trinh vi
cong dan » cong san, cong tan, huong dan
phan dau » phan tu, hang dau
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc trieu tinh - hanh ((trinh va) OR (trinh van)) dang cong dan ((phan dau) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc trieu tinh - hanh ((trinh va) OR (trinh van)) dang cong dan ((phan dau) OR (than cap))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc trieu tinh - hanh ((trinh va) OR (trinh van)) dang cong dan ((phan dau) or (than cap))*".