Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
ban cong » bang cong, van cong, phan cong
doan van » doan va, hoang van, luan van
dan van » dang van, dao van, tan van

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 - thanh trung cua ban cong ((((dan van) or (doan van))) or (hang va)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh trung cua ban cong ((((dan van) OR (doan van))) OR (hang va)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh trung cua ban cong ((((dan van) or (doan van))) or (hang va)) ban*.