Perhaps you should try some spelling variations:
trinh vant » trinh vat, trinh han, trinh viet
tieu sach » chieu sach, dien sach, te sach
trinh van » trinh han, trinh quan, trinh toan
hang cong » dang cong, hang nong, bang cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
toan cau » 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 tieu sach - hanh ((trinh van) or (trinh vant)) hang cong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh ((trinh van) OR (trinh vant)) hang cong manh toan cau.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh ((trinh van) or (trinh vant)) hang cong manh toan cau*.