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 » thong cong, nhung don, nhung lang
hoc thiet » hoc thieu, hoc thuyet, hoc hien
dung cong » dung trong
hang cong » dang cong, hang nong, bang cong
anh toan » manh toan, anh tuan, thanh toan
toan ban » van 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 (dung cong))) or (hang cong)) anh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet hach - hanh trung thuat ((((nhung cong) OR (dung cong))) OR (hang cong)) anh toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet hach - hanh trung thuat ((((nhung cong) OR (dung cong))) or (hang cong)) anh toan ban*".