Perhaps you should try some spelling variations:
tnhanh tinh » thanh tinh, hanh tinh, nhan tinh
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
thiet anh » thien anh, thuyet anh, thien danh
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 - ((nhanh tinh) or (tnhanh 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 - ((nhanh tinh) OR (tnhanh tinh)) va nhung cong dan ((than cap) OR (khan cap)).
• Adding a wildcard symbol may retrieve word variants: hoc thiet anh - ((nhanh tinh) or (tnhanh tinh)) va nhung cong dan ((than cap) or (khan cap))*.