Perhaps you should try some spelling variations:
quan trong » gian trong
tieu sang » chieu sang, tieu dung, tiem nang
hanh tang » hanh trang, anh tang, hanh mang
qua trong » qua trinh, qua song, qua cong
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sang - hanh tang ((qua trong) OR (quan trong)) cong tan ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sang - hanh tang ((qua trong) OR (quan trong)) cong tan ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sang - hanh tang ((qua trong) OR (quan trong)) cong tan ((toan cau) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: theo tieu sang - hanh tang ((qua trong) OR (quan trong)) cong tan ((toan cau) or (toan ban))*.