Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dang hai » dang khai, hang hai, dung hai
toc sach » hoc sach, doc sach, thuoc sach
cham xuc » cam xuc, chat xuc, pham duc
va dang » van dang, va nang, va lang
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ca viet » va viet, co viet, hoa viet
hai ca » hai cua, hai ba, bai ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (toc sach)) ky nang xa hoi. hieu ve ((cham xuc) OR (cham soc)) va dang hai ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (toc sach)) ky nang xa hoi. hieu ve ((cham xuc) OR (cham soc)) va dang hai ca viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (toc sach)) ky nang xa hoi. hieu ve ((cham xuc) OR (cham soc)) va dang hai ca viet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (toc sach)) ky nang xa hoi. hieu ve ((cham xuc) OR (cham soc)) va dang hai ca viet*.