Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach thi » sach thu, sach tai, sach thieu
va thanh » gia thanh, ban thanh, va tinh
va trien » va truyen, va thiet, va tuyen
thi hanh » thi thanh
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
hanh xa » hanh va, hanh ma, hanh xu
va danh » va dinh, va dan, dia danh
va hanh » van hanh, ban hanh, dao hanh
va cam » va cham, va cac, va cao
lam va » nam va, dam va, lam ha

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 thi hanh xa hoi. hieu va cam tuc ((((va hanh) or (va thanh))) or (va danh)) lam va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach thi hanh xa hoi. hieu va cam tuc ((((va hanh) OR (va thanh))) OR (va danh)) lam va trien.
• Adding a wildcard symbol may retrieve word variants: thu sach thi hanh xa hoi. hieu va cam tuc ((((va hanh) or (va thanh))) or (va danh)) lam va trien*.