Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh sang » thanh san, thanh hang, thanh hoang
tang thanh » dang thanh, trung thanh, hoang thanh
sang cua » mang cua, song cua, hang cua
cac dac » cac dan, cac dai, cac bac
cac duc » cac du, cao duc, cac nuoc
hieu ve » hieu va, hieu van
ty hang » ly hang, ty xang, thi hang
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: thuat sach ((ty hang) or (ky nang)) xa hoi. hieu ve ((cac duc) OR (cac dac)) tang thanh sang cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((ty hang) OR (ky nang)) xa hoi. hieu ve ((cac duc) OR (cac dac)) tang thanh sang cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ((ty hang) or (ky nang)) xa hoi. hieu ve ((cac duc) OR (cac dac)) tang thanh sang cua te".
• Adding a wildcard symbol may retrieve word variants: thuat sach ((ty hang) or (ky nang)) xa hoi. hieu ve ((cac duc) OR (cac dac)) tang thanh sang cua te*.