Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
trung tuan » trung thanh, trung tam, tran tuan
nhung cong » thong cong, hang cong, nhung don
hoc thieu » toc thieu, hoc hien
trang cua » tranh cua, tang cua, trung cua
dung cong » dung trong
tan van » tran van, tang van, luan 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 - hanh ((trang cua) or (trung tuan)) ((nhung cong) OR (dung cong)) tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh ((trang cua) OR (trung tuan)) ((nhung cong) OR (dung cong)) tan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - hanh ((trang cua) or (trung tuan)) ((nhung cong) OR (dung cong)) tan van ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh ((trang cua) or (trung tuan)) ((nhung cong) OR (dung cong)) tan van ban*.