Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thiet hach » thien hach, thuyet hach, thiet hai
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, hang cong
trung cam » trung tam, trung cap, trung nam
cam nhung » cam hung, nam nhung, tham nhung
san khan » san khac, san phan, van khanh
san khau » san pham, san khoa, san phu

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 hach) or (thien thanh)) - hanh trung cam nhung cong ((san khan) or (san khau)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thiet hach) OR (thien thanh)) - hanh trung cam nhung cong ((san khan) OR (san khau)) cap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet hach) or (thien thanh)) - hanh trung cam nhung cong ((san khan) or (san khau)) cap*.