Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
thu sach » tu sach, thuat sach, thuoc sach
thuc ban » thuoc ban, thuc dan, thu ban
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
cua viet » ca viet, cua vat, cua dieu
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
cua te » cua tu

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 ly nang xa hoi. hieu va tham thuc ban hanh vai ((((cua viet) OR (hoa viet))) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ly nang xa hoi. hieu va tham thuc ban hanh vai ((((cua viet) OR (hoa viet))) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ly nang xa hoi. hieu va tham thuc ban hanh vai ((((cua viet) OR (hoa viet))) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: thu sach ly nang xa hoi. hieu va tham thuc ban hanh vai ((((cua viet) OR (hoa viet))) or (cua te))*.