Perhaps you should try some spelling variations:
truong cua » truong ca, truong quan, truong cao
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cua » trung tuan, trung cap, dung cua
hoc hieu » hoc thieu, hoc hien, doc hieu
cong tan » cong tac, cong san, cong thanh
khan cap » than cap, khoan cam, phan cac
khan ap » han ap, khan dam

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

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