Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
toc sach » hoc sach, doc sach, thuoc sach
thu nang » thi nang, thu hang, thu bang
van hanh » ban hanh, van anh, van ban
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
vi cua » vai cua, di cua
ve cac » va cac, vien cac
cua cu » cua chu, cua cau, cua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) thu nang xa hoi. hieu ve cac xuc ((van hanh) OR (van thanh)) vi cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) thu nang xa hoi. hieu ve cac xuc ((van hanh) OR (van thanh)) vi cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) thu nang xa hoi. hieu ve cac xuc ((van hanh) OR (van thanh)) vi cua cu".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) thu nang xa hoi. hieu ve cac xuc ((van hanh) OR (van thanh)) vi cua cu*.