Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, nhieu tang
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
trung cap » truong cao, trung tam
cap nhung » cam nhung, vap nhung, dap nhung
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau

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

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