Perhaps you should try some spelling variations:
thieu manh » hieu manh, tien manh, trieu minh
hoc thieu » toc thieu, hoc hien
cua nhung » va nhung
anh tang » anh bang, anh dang, anh nang
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
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 manh - ((anh tang) or (nhanh quang)) cua nhung ((cong dan) OR (cong tan)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu manh - ((anh tang) OR (nhanh quang)) cua nhung ((cong dan) OR (cong tan)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu manh - ((anh tang) or (nhanh quang)) cua nhung ((cong dan) OR (cong tan)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu manh - ((anh tang) or (nhanh quang)) cua nhung ((cong dan) OR (cong tan)) toan ban*.