Perhaps you should try some spelling variations:
hoc thieu » toc thieu
hanh dung » thanh dung, anh dung, hanh dong
dung cong » dung trong
luan bang » luan nang, luan tang, tuan bang
dung cua » dung luan, dung cho
cua dung » cua dang, cua dong, qua dung
cong van » cong vang, cong san, song van
luan ban » luan van, luan san, luan han

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 (hoc hien)) xanh - hanh dung cua dung cong van ((luan ban) or (luan bang))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) xanh - hanh dung cua dung cong van ((luan ban) OR (luan bang)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) OR (hoc hien)) xanh - hanh dung cua dung cong van ((luan ban) or (luan bang))".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) OR (hoc hien)) xanh - hanh dung cua dung cong van ((luan ban) or (luan bang))*.