Perhaps you should try some spelling variations:
truong congg » trong cong, truong dong, truong long
truong cong » trong cong, truong dong, truong long
thiet hach » thien hach, thuyet hach, thiet hai
thanh tung » thanh cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tung tuan » trung tuan, hung tuan, quang tuan
san thanh » ban thanh, van thanh, dan thanh
son thanh » ban thanh, van thanh

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 - thanh tung tuan ((truong congg) or (truong cong)) ((san thanh) OR (son thanh)) hai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet hach - thanh tung tuan ((truong congg) OR (truong cong)) ((san thanh) OR (son thanh)) hai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet hach - thanh tung tuan ((truong congg) or (truong cong)) ((san thanh) OR (son thanh)) hai".
• Adding a wildcard symbol may retrieve word variants: hoc thiet hach - thanh tung tuan ((truong congg) or (truong cong)) ((san thanh) OR (son thanh)) hai*.