Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
thu sac » thu san, thu xac, thu dac
xuc ban » duc ban, cuc ban, quoc ban
benh da » benh dai, benh va, benh do
benh di » benh dai, ben di, benh do
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sac) OR (thu sach)) ky nang xa hoi. hieu van cam xuc ban ((benh di) or (benh da)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sac) OR (thu sach)) ky nang xa hoi. hieu van cam xuc ban ((benh di) OR (benh da)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sac) OR (thu sach)) ky nang xa hoi. hieu van cam xuc ban ((benh di) or (benh da)) cua tre*".