Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thu nang » thi nang, thu hang, thu bang
hanh doi » thanh doi, hanh noi, hang doi
doi cua » dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
nang xa » nang x, lang xa, nang ma
ve cac » va cac, vien cac
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: ((te sach) OR (toc sach)) thu nang xa hoi. hieu ((ve cham) or (ve cac)) duc va hanh doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) thu nang xa hoi. hieu ((ve cham) OR (ve cac)) duc va hanh doi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) thu nang xa hoi. hieu ((ve cham) or (ve cac)) duc va hanh doi cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) thu nang xa hoi. hieu ((ve cham) or (ve cac)) duc va hanh doi cua te*.