Perhaps you should try some spelling variations:
trang tuan » tran tuan, trung tuan, trong tuan
nhung hong » nhung chong, nhung huong, nhung phong
hieu manh » chieu xanh, hieu nganh, hien hanh
trang qua » trong qua, trong quan, trung quan
van thanh » ban thanh, van tuan
thanh lap » thanh san, phan lap, thanh hai
hong van » hoang van, thong van, phong van

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) OR (dieu hanh)) - hanh ((trang qua) or (trang tuan)) nhung hong van thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (dieu hanh)) - hanh ((trang qua) OR (trang tuan)) nhung hong van thanh lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) OR (dieu hanh)) - hanh ((trang qua) or (trang tuan)) nhung hong van thanh lap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) OR (dieu hanh)) - hanh ((trang qua) or (trang tuan)) nhung hong van thanh lap*.