Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh toan » tinh toan, thanh toan, trinh han
thong cong » trong cong, tong cong, thong thong
tan thanh » tran thanh, tang thanh, toan thanh
thanh cau » thanh chau, thanh mau, nhanh cau
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
tinh va » tich va, trinh van, trinh vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - hanh ((tinh va) or (trinh toan)) thong cong tan thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((tinh va) OR (trinh toan)) thong cong tan thanh cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((tinh va) or (trinh toan)) thong cong tan thanh cau*.