Perhaps you should try some spelling variations:
thong trong » thuong trong, thong thong, thong thuong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
trung cap » truong cao, trung tam
trong van » trong cac
dung cua » dung luan, dung cho
van hanh » van thanh, ban hanh, van anh
hanh cau » nhanh cau, hang cau, hanh cac

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 ((dung cua) or (trung cap)) thong trong van hanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh ((dung cua) OR (trung cap)) thong trong van hanh cau.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((dung cua) or (trung cap)) thong trong van hanh cau*.