Perhaps you should try some spelling variations:
thiet thanh » thien thanh, thi thanh, viet thanh
hoc thiet » hoc thieu, hoc thuyet, hoc hien
hanh dung » thanh dung, anh dung, hanh dong
luan nang » luan van, van nang, luan san
nong dan » cong dan, nong san, nguong dan
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan tu

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 thanh - hanh dung luan nang ((nong dan) or (cong tan)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet thanh - hanh dung luan nang ((nong dan) OR (cong tan)) phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thiet thanh - hanh dung luan nang ((nong dan) or (cong tan)) phan cau*.