Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
tu sach » thu sach, su sach, te sach
co sach » bo sach, cuon sach, hoc sach
nang xa » nang x, lang xa, nang ma
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
ca viet » va viet, co viet, hoa viet

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 (co sach)) ky nang xa hoi. hieu van cham truc va danh vi ((cua vat) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (co sach)) ky nang xa hoi. hieu van cham truc va danh vi ((cua vat) OR (ca viet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (co sach)) ky nang xa hoi. hieu van cham truc va danh vi ((cua vat) or (ca viet))*.