Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
phuong lan » phuong la, thuong lan, phuong linh
hieu cach » hieu cac, chieu sach, hieu ca
trinh vat » trinh van, trinh luat, sinh vat
vat nhung » va nhung, vap nhung, vai nhung
hoc hieu » hoc thieu, hoc hien, doc hieu
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - hanh trinh vat nhung ((phuong lan) OR (phung van)) toan cau~.
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - hanh trinh vat nhung ((phuong lan) or (phung van)) toan cau*.