Perhaps you should try some spelling variations:
chat thuc » thuat thuc, nhan thuc, chat thai
hieu van » hieu va, thien van, lieu va
van chat » cao chat
thuc dao » thuc dan, thuc day, chuc dao
dao danh » dao doanh, do danh, dao dan
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cau cua » cau qua, ca cua, cu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. hieu van chat thuc dao danh ((cau cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu van chat thuc dao danh ((cau cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu van chat thuc dao danh ((cau cua) or (dai cua)) tre*.