Perhaps you should try some spelling variations:
thieu tach » chiet tach, chieu sach, hieu cach
thien hach » thien thanh, hien hanh
trung tuan » trung thanh, trung tam, tran tuan
luong quan » thong quan, duong qua
thong den » thong dien, thong dan, tuong den
den than » den thanh, dien than, dan than
than ban » thanh ban, toan ban, than man

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu tach) OR (thien hach)) - hanh ((trung tuan) or (luong quan)) thong thong den than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tach) OR (thien hach)) - hanh ((trung tuan) OR (luong quan)) thong thong den than ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu tach) OR (thien hach)) - hanh ((trung tuan) or (luong quan)) thong thong den than ban*".