Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
trung vap » trung cap, trung va, trung van
vap nhung » va nhung, ve nhung, voi nhung
khoa dan » khoa dang, hoa dan, khoan danh
khoa can » khoa cam, khoa cap, khoi can
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((khoa dan) OR (khoa can)) trinh - thanh trung vap nhung cong tan than cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((khoa dan) OR (khoa can)) trinh - thanh trung vap nhung cong tan than cap".
• Adding a wildcard symbol may retrieve word variants: ((khoa dan) OR (khoa can)) trinh - thanh trung vap nhung cong tan than cap*.