Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc dan, thuc va
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
cuu thuc » cuu tac
tu sach » thu sach, su sach, te sach
cua tre » cuu tre, cua triet, dua tren
van cuu » van cau, van chu, van cu
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
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: ((tu sach) or (thu hoach)) ky dang xa hoi. hieu van cuu thuc van hanh vai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) ky dang xa hoi. hieu van cuu thuc van hanh vai ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) ky dang xa hoi. hieu van cuu thuc van hanh vai ((cua tre) or (cua te))*.