Perhaps you should try some spelling variations:
thanh tinh » thanh binh, nhanh tinh, than kinh
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 tinh » hanh trinh, nhanh tinh, canh tinh
cong dan » cong san, cong tan, huong dan
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan 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 thiet anh - ((hanh tinh) OR (thanh tinh)) va nhung cong dan ((than cap) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet anh - ((hanh tinh) OR (thanh tinh)) va nhung cong dan ((than cap) OR (khan cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet anh - ((hanh tinh) OR (thanh tinh)) va nhung cong dan ((than cap) or (khan cap))".
• Adding a wildcard symbol may retrieve word variants: hoc thiet anh - ((hanh tinh) OR (thanh tinh)) va nhung cong dan ((than cap) or (khan cap))*.