Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tao nano » tao nganh, cao nang, tao nhan
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, dua tren
hanh va » hang va, hanh vi
xuc van » duc van, luc van, vuc van
su sach » so sach, vu sach
bac hoi » bac ho, bac hoc, sach hoi
tao cao » bao cao, toan cao
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao

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 xuc van hanh va ((cua tre) OR (cua triet))~.
• 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 xuc van hanh va ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((tao nano) or (tao cao)) bac hoi. hieu va cam xuc van hanh va ((cua tre) OR (cua triet))*".