Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
hanh lam » thanh lap, hanh kem, hanh va
su sach » so sach, vu sach
nang so » nang som, nang co, nang ho
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
lam cua » nam cua, lam chat
so hai » son hai, su hai, so ha
va cam » va cham, va cac, va cao
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) or (su sach)) ky nang so hai. hieu va cam duc van hanh lam cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) ky nang so hai. hieu va cam duc van hanh lam cua te.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ky nang so hai. hieu va cam duc van hanh lam cua te*.