Perhaps you should try some spelling variations:
xach tay » canh tay
hieu van » hieu va, thien van, lieu va
va kinh » va tinh, qua kinh
cau xuc » cam xuc, cau luc, cau truc
van cau » van dau, van hau, van chat
kinh tu » kinh te, tinh tu, dinh tu
sach tu » sach thu, cach tu, sach ty
nano x » nano 1
xuc va » duc va, tuc va, luc va
nano o » nano 1, nano cuo, nano mot
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((xach tay) or (sach tu)) ((nano x) or (nano o)) ho. hieu van cau xuc va kinh tu va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((xach tay) OR (sach tu)) ((nano x) OR (nano o)) ho. hieu van cau xuc va kinh tu va thiet.
• Adding a wildcard symbol may retrieve word variants: tu ((xach tay) or (sach tu)) ((nano x) or (nano o)) ho. hieu van cau xuc va kinh tu va thiet*.