Perhaps you should try some spelling variations:
dung chung » dung cong, dung ung, dung trung
hoc thiet » hoc thieu, hoc thuyet, hoc hien
thiet anh » thien anh, thuyet anh, thien danh
hanh nang » anh nang, ganh nang, hanh mang
nang quan » ban quan, nang suat
quan dung » quang dung, quan duong, qua dung
chung han » chung nhan, chung than, chuong han
thanh cha » thanh ha, thanh nha, thanh phan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet anh - hanh nang quan dung chung han ((thanh thuy) or (thanh cha))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet anh - hanh nang quan dung chung han ((thanh thuy) OR (thanh cha)).
• Adding a wildcard symbol may retrieve word variants: hoc thiet anh - hanh nang quan dung chung han ((thanh thuy) or (thanh cha))*.