Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
van hanh » van thanh, ban hanh, van anh
nano bac » tao bac, bang bac, dan bac
vu sach » vu bach, su sach, vu khach
hanh va » hang va, hanh vi
xuc van » duc van, luc van, vuc van
va cham » va chat, va tham
hieu va » lieu va, hieu qua
bac hoa » bach hoa, bac ha, bac ho
ty nano » tu nano, day nano, tao nano
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (vay khach)) ty nano bac hoa. hieu va cham xuc van hanh va ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vay khach)) ty nano bac hoa. hieu va cham xuc van hanh va ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (vay khach)) ty nano bac hoa. hieu va cham xuc van hanh va ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vay khach)) ty nano bac hoa. hieu va cham xuc van hanh va ((cua te) OR (cua tu))*.