Perhaps you should try some spelling variations:
trung thuat » trong thuat, thuong thuat, trung tuan
thiet hach » thien hach, thuyet hach, thiet hai
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, nhung don
hoc thiet » hoc thieu, hoc thuyet, hoc hien
hang cong » dang cong, hang nong, bang cong
tuan ban » tuan bang, toan ban, luan ban

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 - hanh trung thuat ((nhung cong) or (hang cong)) anh tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet hach - hanh trung thuat ((nhung cong) OR (hang cong)) anh tuan ban*.