Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
van chat » cao chat
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
va chat » va phat, cao chat, hoa chat
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
vi cua » vai cua, di 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) or (thu sach)) ky nang xa hoi. hieu ((va chat) OR (van chat)) luc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang xa hoi. hieu ((va chat) OR (van chat)) luc va hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky nang xa hoi. hieu ((va chat) OR (van chat)) luc va hanh vi cua tre*".