Perhaps you should try some spelling variations:
tu tieng » luc tieng, tu tuong, tu trong
danh va » doanh va, hanh va, anh va
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
va danh » va dinh, va dan, va hanh
hieu ve » hieu va, hieu van
dam tu » nam tu, tam tu, dam thuc
tu bac » tu ban, tu bat, tu bai
cam tu » cam thu, nam tu, tam tu
ma noi » ha noi, ma moi, va noi
va tu » va su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu bac) or (tu cac)) ky tang ma noi. hieu ve ((cam tu) OR (dam tu)) va danh va tu tieng~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu bac) OR (tu cac)) ky tang ma noi. hieu ve ((cam tu) OR (dam tu)) va danh va tu tieng*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu bac) or (tu cac)) ky tang ma noi. hieu ve ((cam tu) OR (dam tu)) va danh va tu tieng*".