Perhaps you should try some spelling variations:
hoc thien » hoc hien, hoc thieu, hoc tien
hoc thiet » hoc thieu, hoc thuyet, hoc hien
ctinh cua » chinh cua, sinh cua, trinh cua
dung cong » dung trong
dan thanh » dang thanh, danh thanh, ban thanh
thanh lap » thanh san, phan lap, thanh hai
tinh cua » trinh cua, sinh cua, tinh chat
cong dan » cong san, cong tan, huong dan

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

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