Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
phuong tinh » phuong trinh, phuong binh, khuong tinh
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
thanh tung » thanh cong
toan cau » 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: theo chieu sach - ((hanh trang) OR (thanh tung)) va nhung phuong tinh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - ((hanh trang) OR (thanh tung)) va nhung phuong tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((hanh trang) OR (thanh tung)) va nhung phuong tinh toan cau*.