Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
van chat » cao chat
xa khanh » xa thanh, van khanh, dat khanh
khanh vi » hanh vi, khanh v, nhanh vi
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, toan cau
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua
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: ((tu sach) or (thu sach)) y nang xa hoi. hieu ((van cau) or (van chat)) tuc xa khanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang xa hoi. hieu ((van cau) OR (van chat)) tuc xa khanh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y nang xa hoi. hieu ((van cau) or (van chat)) tuc xa khanh vi cua tu*.