Perhaps you should try some spelling variations:
trong dang » truong dang, trong dan, trong dong
hoc thieu » toc thieu, hoc hien
doi chieu » doc hieu, doi chi, ho chieu
trang van » trang va, trong van, tang van
dang than » dang thanh, sang than, dang tran
tran van » luan van
than cau » toan cau, phan cau, than cap

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) or (doi chieu)) sach - hanh ((trang van) OR (tran van)) dung trong dang than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doi chieu)) sach - hanh ((trang van) OR (tran van)) dung trong dang than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (doi chieu)) sach - hanh ((trang van) OR (tran van)) dung trong dang than cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doi chieu)) sach - hanh ((trang van) OR (tran van)) dung trong dang than cau*.