Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
thu phuong » thi phuong, thu huong, theo phuong
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
dan toan » van toan, dan than, manh toan
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: hoc chiet tach - hanh trinh cua ((thu phuong) or (((nhung cong) OR (thong cong)))) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - hanh trinh cua ((thu phuong) OR (((nhung cong) OR (thong cong)))) dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - hanh trinh cua ((thu phuong) or (((nhung cong) OR (thong cong)))) dan toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh trinh cua ((thu phuong) or (((nhung cong) OR (thong cong)))) dan toan ban*.