Perhaps you should try some spelling variations:
thiet thanh » thien thanh, thi thanh, viet thanh
thanh dung » thanh duong, thanh tung, thanh hung
hoc thiet » hoc thieu, hoc thuyet, hoc hien
luan nang » luan van, van nang, luan san
nong dan » nong san, nguong dan, huong dan
cong dan » cong san, cong tan, huong dan
phan cac » nhan cach, phan dau, phan lap

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