Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
hieu van » hieu va, thien van, lieu va
van anh » van thanh, tuan anh, van minh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va
via cua » gia cua, gian cua, giau cua
anh via » anh va, anh bia, anh viet
lo van » le van, vo van, so van
cac lo » cac lop, cac co, cac bo
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: ((thu sach) or (thuat sach)) ky nang xa hoi. ((hieu ve) OR (hieu van)) cac lo van anh via cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) ky nang xa hoi. ((hieu ve) OR (hieu van)) cac lo van anh via cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thuat sach)) ky nang xa hoi. ((hieu ve) OR (hieu van)) cac lo van anh via cua te".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuat sach)) ky nang xa hoi. ((hieu ve) OR (hieu van)) cac lo van anh via cua te*.