Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh vi » hanh vi, thanh va, thanh ve
hoc sac » hoc sach, hoc mac, hoc sau
hoc cac » hoc cao
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cam duc » cao duc, pham duc, nam duoc
vi cua » vai cua, di 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: ((hoc sac) or (hoc cac)) ky lang xa hoi. hieu ve ((cam duc) OR (cam xuc)) van thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sac) OR (hoc cac)) ky lang xa hoi. hieu ve ((cam duc) OR (cam xuc)) van thanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sac) or (hoc cac)) ky lang xa hoi. hieu ve ((cam duc) OR (cam xuc)) van thanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((hoc sac) or (hoc cac)) ky lang xa hoi. hieu ve ((cam duc) OR (cam xuc)) van thanh vi cua te*.