Perhaps you should try some spelling variations:
tieng hach » tieng anh, tieng han, thien hach
trung tran » trung thanh, trung tam, hung tran
trung tuan » trung thanh, trung tam, tran tuan
thong cong » trong cong, tong cong, thong thong
do tieng » doc tieng, hoc tieng, noi tieng
cong sat » cong suat, cong san, cong hat
sat nhan » hat nhan, sat phan, ca nhan
nhan lap » phan lap, thanh lap, nhan loai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: do tieng hach - thanh ((trung tran) or (trung tuan)) thong cong sat nhan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: do tieng hach - thanh ((trung tran) OR (trung tuan)) thong cong sat nhan lap.
• Adding a wildcard symbol may retrieve word variants: do tieng hach - thanh ((trung tran) or (trung tuan)) thong cong sat nhan lap*.