Perhaps you should try some spelling variations:
cua triet » su triet, va triet
xach tay » canh tay
hieu van » hieu va, thien van, lieu va
tinh lap » trinh lap, tinh lao, dinh lap
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
cac day » cac dan, cac dai, cac cay
va tinh » may tinh

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 y)) nang xa hoi. hieu van cac day va tinh lap ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((xach tay) OR (sach y)) nang xa hoi. hieu van cac day va tinh lap ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: tu ((xach tay) or (sach y)) nang xa hoi. hieu van cac day va tinh lap ((cua triet) or (cua viet))*.