Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
dung thanh » duong thanh, dong thanh, dang thanh
hanh tung » thanh tung, manh tung, hanh dung
qua thong » quang thong, suat thong, xuat thong
qua trong » quan trong, qua trinh, qua song
san ban » sang ban, van ban, can 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 chieu sach - ((hanh tung) or (thanh trung)) ((qua thong) OR (qua trong)) dung thanh san ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((hanh tung) OR (thanh trung)) ((qua thong) OR (qua trong)) dung thanh san ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - ((hanh tung) or (thanh trung)) ((qua thong) OR (qua trong)) dung thanh san ban".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((hanh tung) or (thanh trung)) ((qua thong) OR (qua trong)) dung thanh san ban*.