Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dang xay » dang van, van xay
cua viet » ca viet, hoa viet, cua dieu
ky dang » ky nang, ky danh
te sach » toc sach
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
dau vai » dau va, dau hai, dau tai
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
va dau » va dao

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 (te sach)) ky dang xay hoi. hieu ve cam xuc va dau vai ((cua viet) OR (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (te sach)) ky dang xay hoi. hieu ve cam xuc va dau vai ((cua viet) OR (cua vat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (te sach)) ky dang xay hoi. hieu ve cam xuc va dau vai ((cua viet) OR (cua vat))".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (te sach)) ky dang xay hoi. hieu ve cam xuc va dau vai ((cua viet) OR (cua vat))*.