Perhaps you should try some spelling variations:
thanh trung » thanh tung
thong huong » thong thuong, thong duong, thong thong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hiem ngan » kim ngan, viem gan
trung vap » trung cap, trung va, trung van
vap thong » va thong, van thong, phap thong
dan cach » dan cac, nhan cach, bang cach
dan canh » van canh, dan hanh, dang hanh

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 (hiem ngan)) - thanh trung vap thong huong ((dan cach) OR (dan canh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (hiem ngan)) - thanh trung vap thong huong ((dan cach) OR (dan canh)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (hiem ngan)) - thanh trung vap thong huong ((dan cach) OR (dan canh)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (hiem ngan)) - thanh trung vap thong huong ((dan cach) OR (dan canh)) cau*.