Perhaps you should try some spelling variations:
hanh truong » hanh trong, anh truong, manh truong
chieu sach » chinh sach, chiet tach, chieu sang
truong cua » truong ca, truong quan, truong cao
phuong van » phung van, phuong lan, phuong va
cua nhung » va nhung
phong van » phung van, thong van, phong va
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (cuu tinh)) - hanh truong cua nhung ((phuong van) OR (phong van)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (cuu tinh)) - hanh truong cua nhung ((phuong van) OR (phong van)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (cuu tinh)) - hanh truong cua nhung ((phuong van) OR (phong van)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (cuu tinh)) - hanh truong cua nhung ((phuong van) OR (phong van)) toan cao*.