Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
thanh tung » thanh cong
thuong han » thuong mai, thuong va, thuong gap
hanh cham » thanh pham, hanh lam, hanh nam
tung dat » dung dat, vung dat, tung dan
dat hang » dat khanh, dat quang, tat thang
han hanh » ban hanh, van hanh, han danh

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 hach) or (dieu hanh)) - thanh tung dat hang thuong han hanh cham~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien hach) OR (dieu hanh)) - thanh tung dat hang thuong han hanh cham*.