Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
phuong loan » phuong lan, huong loan, phuong doan
hanh trinh » canh tranh, hanh chinh
hieu sach » chieu sach, hieu cach, dien sach
doc hieu » toc thieu, hoc thieu, hoc hien
trinh va » trinh van, trinh vat, trinh ve
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu sach - hanh trinh va nhung phuong loan ((doanh tai) or (((toan cao) OR (toan ban))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sach - hanh trinh va nhung phuong loan ((doanh tai) OR (((toan cao) OR (toan ban)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu sach - hanh trinh va nhung phuong loan ((doanh tai) or (((toan cao) OR (toan ban))))".
• Adding a wildcard symbol may retrieve word variants: doc hieu sach - hanh trinh va nhung phuong loan ((doanh tai) or (((toan cao) OR (toan ban))))*.