Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
trang cua » tranh cua, tang cua, thang cua
trung cua » truong cua, trung tuan, trung cap
cong hinh » cong vinh, cong tinh, hong hinh
hinh toan » tinh toan, thanh toan, trinh toan
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 ((hieu manh) or (chieu sach)) - hanh ((trang cua) OR (trung cua)) nhung cong hinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu manh) OR (chieu sach)) - hanh ((trang cua) OR (trung cua)) nhung cong hinh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu manh) or (chieu sach)) - hanh ((trang cua) OR (trung cua)) nhung cong hinh toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (chieu sach)) - hanh ((trang cua) OR (trung cua)) nhung cong hinh toan cao*.