Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cac nuoc » cap nuoc, hoc nuoc, cua nuoc
xach tay » canh tay
quang xa » quan xa, quang ma, quang va
sach tay » sach hay, sach nay, sach tai
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
vi cua » vai cua, di cua
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: tu ((sach tay) OR (xach tay)) quang xa hoi. hieu van ((cac nuoc) or (dat nuoc)) va tinh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tay) OR (xach tay)) quang xa hoi. hieu van ((cac nuoc) OR (dat nuoc)) va tinh vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tay) OR (xach tay)) quang xa hoi. hieu van ((cac nuoc) or (dat nuoc)) va tinh vi cua tu".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tay) OR (xach tay)) quang xa hoi. hieu van ((cac nuoc) or (dat nuoc)) va tinh vi cua tu*.