Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh sinh » hanh tinh, hanh dinh, hinh sinh
cua nhung » va nhung
hoc hieu » hoc thieu, hoc hien, doc hieu
sinh cua » manh cua, dinh cuu, sinh va
cong tan » cong tac, cong san, cong thanh
chan tu » phan tu, han tu, chai tu
chon tu » con tu, cho tu, choi tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - hanh sinh cua nhung ((cong dong) or (cong tan)) ((chan tu) or (chon tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh sinh cua nhung ((cong dong) OR (cong tan)) ((chan tu) OR (chon tu)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh sinh cua nhung ((cong dong) or (cong tan)) ((chan tu) or (chon tu))*.