Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
thiet anh » thien anh, thuyet anh, thien danh
hanh sinh » hanh dinh, hinh sinh, hanh chinh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cua nhung » va nhung
thanh lap » phan lap, thanh hai, thanh van
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 thiet anh - ((hanh sinh) OR (hanh tinh)) cua nhung cong dan ((thanh lap) or (thanh san))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet anh - ((hanh sinh) OR (hanh tinh)) cua nhung cong dan ((thanh lap) OR (thanh san)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet anh - ((hanh sinh) OR (hanh tinh)) cua nhung cong dan ((thanh lap) or (thanh san))".
• Adding a wildcard symbol may retrieve word variants: hoc thiet anh - ((hanh sinh) OR (hanh tinh)) cua nhung cong dan ((thanh lap) or (thanh san))*.