Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
trang tuan » tran tuan, trung tuan, trong tuan
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
vien sach » vien bach, dien sach, viet sach
hoc vien » hoc hien, hoc viet, hoc tieng
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 vien sach - hanh trang tuan ((nhung cong) OR (thong cong)) dan ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc vien sach - hanh trang tuan ((nhung cong) OR (thong cong)) dan ((toan tap) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc vien sach - hanh trang tuan ((nhung cong) OR (thong cong)) dan ((toan tap) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc vien sach - hanh trang tuan ((nhung cong) OR (thong cong)) dan ((toan tap) or (toan ban))*.