Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh ha » thanh hoa, thanh hai, nhanh ha
tu sach » thu sach, su sach, te sach
duc van » duc va, duc tan, duc manh
ma hoi » mai hoi, xa hoi, me hoi
hieu v » hieu va, hieu ve, hieu 2
v pham » vi pham, d pham
ha cua » hoa cua, hai cua, nha cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thu hoach)) ky nang ((ma hoi) OR (ma hoa)). hieu v pham duc van thanh ha cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) ky nang ((ma hoi) OR (ma hoa)). hieu v pham duc van thanh ha cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu hoach)) ky nang ((ma hoi) OR (ma hoa)). hieu v pham duc van thanh ha cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) ky nang ((ma hoi) OR (ma hoa)). hieu v pham duc van thanh ha cua te*.