Perhaps you should try some spelling variations:
tao nano » tao nganh, cao nang, tao nhan
van hanh » van thanh, ban hanh, van anh
hanh va » hang va, hanh vi
vuc van » duc van, luc van, thuc van
cam vuc » cam xuc
hieu va » lieu va, hieu qua
su sach » so sach, vu sach
bac hoi » bac ho, bac hoc, sach hoi
tao cao » bao cao, toan cao
va cam » va cham, va cac, va cao
va cua » va chua, via cua, ca cua
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: su sach ((tao nano) or (tao cao)) bac hoi. hieu va cam vuc van hanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((tao nano) OR (tao cao)) bac hoi. hieu va cam vuc van hanh va cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ((tao nano) or (tao cao)) bac hoi. hieu va cam vuc van hanh va cua te*.