Perhaps you should try some spelling variations:
phuong dan » phuong danh, phuong doan, huong dan
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
luan dung » lan dung, luan dong, luan hung
quan dong » quang dong, quan long, quan hoang
dan thanh » dang thanh, danh thanh, ban thanh
thanh cac » hanh cac, thanh bac, thanh ca
hoc hieu » hoc thieu, hoc hien, doc hieu

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 tang) or (canh tranh)) ((luan dung) or (quan dong)) phuong dan thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ((hanh tang) OR (canh tranh)) ((luan dung) OR (quan dong)) phuong dan thanh cac.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((hanh tang) or (canh tranh)) ((luan dung) or (quan dong)) phuong dan thanh cac*.