Perhaps you should try some spelling variations:
thien thanh » thi thanh, hien hanh, chien tranh
tien thanh » tien thinh, tran thanh, den thanh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
trinh van » trinh han, trinh quan, trinh toan
dang cong » dung cong
dan thanh » dang thanh, danh thanh, ban thanh
thanh lap » thanh san, phan lap, thanh hai

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 trinh van ((nhung cong) or (dang cong)) dan thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (tien thanh)) - hanh trinh van ((nhung cong) OR (dang cong)) dan thanh lap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) or (tien thanh)) - hanh trinh van ((nhung cong) or (dang cong)) dan thanh lap*.