Perhaps you should try some spelling variations:
thien thanh » thi thanh, hien hanh, chien tranh
tien thanh » tien thinh, tran thanh, den thanh
chinh han » chinh phan, chin han, chinh ban
dung cong » dung trong
thanh cau » thanh chau, thanh mau, nhanh cau
nhanh cay » nhanh ha, nhanh bac, nhanh va
han dung » chan dung, han duong, hanh dung
cong van » cong vang, cong san, song van

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 chinh han dung cong van ((thanh cau) or (nhanh cay))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (tien thanh)) - hanh chinh han dung cong van ((thanh cau) OR (nhanh cay)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien thanh) OR (tien thanh)) - hanh chinh han dung cong van ((thanh cau) or (nhanh cay))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) OR (tien thanh)) - hanh chinh han dung cong van ((thanh cau) or (nhanh cay))*.