Perhaps you should try some spelling variations:
truong cong » trong cong, truong dong, truong long
thiet hach » thien hach, thuyet hach, thiet hai
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trung va » truong va, trung ha, trung tam
trang va » tran van, hang va
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap

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 ((trung va) or (trang va)) truong cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet hach - thanh ((trung va) OR (trang va)) truong cong tan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thiet hach - thanh ((trung va) or (trang va)) truong cong tan toan cao*.