Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van cham » van chat, van tham, va cham
cham tuc » nham thuc, pham thuc, tham thuc
thanh vi » hanh vi, thanh va, thanh ve
xa thanh » va thanh, ha thanh, ta thanh
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cua triet, dua tren
tu cach » tu cac
nang xa » nang x, lang xa, nang ma
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (thuoc sach)) ky nang xa hoi. hieu van cham tuc xa thanh vi ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thuoc sach)) ky nang xa hoi. hieu van cham tuc xa thanh vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (thuoc sach)) ky nang xa hoi. hieu van cham tuc xa thanh vi ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (thuoc sach)) ky nang xa hoi. hieu van cham tuc xa thanh vi ((cua tre) OR (cuu tre))*.