Perhaps you should try some spelling variations:
nhung chong » nhung cong, nhung phong, nhung phuong
lanh tranh » canh tranh, lan tranh, sach tranh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
hieu cach » hieu cac, hieu ca, biet cach
cua nhung » va nhung
chong van » thong van, hong van, phong van
van quan » van ban
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) OR (chieu sach)) - ((lanh tranh) or (hanh trinh)) cua nhung chong van quan cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu cach) OR (chieu sach)) - ((lanh tranh) OR (hanh trinh)) cua nhung chong van quan cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu cach) OR (chieu sach)) - ((lanh tranh) or (hanh trinh)) cua nhung chong van quan cu".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cach) OR (chieu sach)) - ((lanh tranh) or (hanh trinh)) cua nhung chong van quan cu*.