Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
chinh vat » chinh va, chinh dat, chinh viet
vat nhung » va nhung, vap nhung, vai nhung
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan tap » toan ban

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)) - hanh chinh vat nhung ((cong tan) or (cong san)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (chieu sang)) - hanh chinh vat nhung ((cong tan) OR (cong san)) toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) or (chieu sang)) - hanh chinh vat nhung ((cong tan) or (cong san)) toan tap*.