Perhaps you should try some spelling variations:
thien thanh » thi thanh, hien hanh, chien tranh
tien thanh » tien thinh, tran thanh, den thanh
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 ((thien thanh) OR (tien 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 ((thien thanh) OR (tien thanh)) - hanh dung luan nang ((nong dan) OR (cong tan)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien thanh) OR (tien thanh)) - hanh dung luan nang ((nong dan) or (cong tan)) phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) OR (tien thanh)) - hanh dung luan nang ((nong dan) or (cong tan)) phan cau*.