Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
trong thuat » trong hoat, trong thu, trong phat
thieu sach » chieu sach, thien hach, hieu cach
nhung cong » thong cong, hang cong, nhung don
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan cac

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 trong thuat ((nhung cong) or (dung cong)) dan ((than cap) OR (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh trong thuat ((nhung cong) OR (dung cong)) dan ((than cap) OR (khan cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - thanh trong thuat ((nhung cong) or (dung cong)) dan ((than cap) OR (khan cap))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh trong thuat ((nhung cong) or (dung cong)) dan ((than cap) OR (khan cap))*.