Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
bang cong » dang cong, bang song, hang cong
trinh va » trinh van, trinh vat, trinh ve
van tuan » van quan, van ban, anh tuan
va bang » va nang, va lang, va ban
van tan » van ban, van tai, van thanh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sach - hanh trinh va bang cong ((van tuan) or (van tan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh trinh va bang cong ((van tuan) OR (van tan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh trinh va bang cong ((van tuan) or (van tan)) cau*.