Perhaps you should try some spelling variations:
hoc thieu » toc thieu
trinh cua » trinh luat, trinh quan, trinh luan
cong cong » cong dong, trong cong, dung cong
tinh cua » sinh cua, tinh chat, tranh cua
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban

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

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