Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
trinh han » trinh quan
hang cong » dang cong, hang nong, bang cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
dinh van » sinh vat
dinh vat » sinh vat, dinh dat, dinh va
toan cao » toan ban, toan tap

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 ((dinh van) or (((dinh vat) or (trinh han)))) hang cong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh ((dinh van) OR (((dinh vat) OR (trinh han)))) hang cong manh toan cao.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((dinh van) or (((dinh vat) or (trinh han)))) hang cong manh toan cao*.