Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
lanh tranh » canh tranh, lan tranh, sach tranh
hieu cach » hieu cac, chieu sach, hieu ca
cua nhung » va nhung
chong van » thong van, hong van, chong va
phong van » phung van, thong van, phong va
hoc hieu » hoc thieu, hoc hien, doc hieu
quan cu » quan cua, quang cu, quan cau

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 cach - ((lanh tranh) or (hanh trinh)) cua nhung ((chong van) OR (phong van)) quan cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - ((lanh tranh) OR (hanh trinh)) cua nhung ((chong van) OR (phong van)) quan cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu cach - ((lanh tranh) or (hanh trinh)) cua nhung ((chong van) OR (phong van)) quan cu".
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - ((lanh tranh) or (hanh trinh)) cua nhung ((chong van) OR (phong van)) quan cu*.