Perhaps you should try some spelling variations:
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
hang cong » dang cong, hang nong, bang cong
ho thiet » hoa thiet, so thiet, hoc thieu
cong tan » cong tac, cong san, cong thanh
tran ban » tranh ban, tran van, toan ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho thiet) or (hoc thiet)) tach - hanh ((trung cua) OR (trung cap)) hang cong tan tran ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho thiet) OR (hoc thiet)) tach - hanh ((trung cua) OR (trung cap)) hang cong tan tran ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho thiet) or (hoc thiet)) tach - hanh ((trung cua) OR (trung cap)) hang cong tan tran ban".
• Adding a wildcard symbol may retrieve word variants: ((ho thiet) or (hoc thiet)) tach - hanh ((trung cua) OR (trung cap)) hang cong tan tran ban*.