Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh chat
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
trinh thuc » trinh tu, trinh thi
thong cong » trong cong, tong cong, thong thong
tran chau » tranh chap, tran huu
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (chieu sang)) - hanh ((trinh thuat) OR (trinh thuc)) thong cong tan tran chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu sang)) - hanh ((trinh thuat) OR (trinh thuc)) thong cong tan tran chau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) or (chieu sang)) - hanh ((trinh thuat) OR (trinh thuc)) thong cong tan tran chau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chieu sang)) - hanh ((trinh thuat) OR (trinh thuc)) thong cong tan tran chau*.