Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
dan thanh » dang thanh, danh thanh, ban thanh
chat hoc » chat hoa, chat thom, cho hoc
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
cam hoc » am hoc, cam hoa, cac hoc
cao hoc » co hoc, cho hoc
doi cua » dai cua, hoi cua
y nang » ky nang, ly nang, v nang
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y nang xa hoi. lieu va ((cam hoc) or (((cao hoc) OR (chat hoc)))) dan thanh doi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang xa hoi. lieu va ((cam hoc) OR (((cao hoc) OR (chat hoc)))) dan thanh doi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang xa hoi. lieu va ((cam hoc) or (((cao hoc) OR (chat hoc)))) dan thanh doi cua tu".
• Adding a wildcard symbol may retrieve word variants: so sach y nang xa hoi. lieu va ((cam hoc) or (((cao hoc) OR (chat hoc)))) dan thanh doi cua tu*.