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