Perhaps you should try some spelling variations:
truc ngan » tu ngan, thu ngan, tri ngan
cac truc » cau truc, cac tru, cac trung
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
hieu ve » hieu va, hieu van
hang vi » hanh vi, hang di, khang voi
ca tren » cau tren, cu tren, la tren
ve cac » va cac, vien cac

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 ty xang xa hoi. hieu ve cac truc ngan ((hang vi) or (hang va)) ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty xang xa hoi. hieu ve cac truc ngan ((hang vi) OR (hang va)) ca tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ty xang xa hoi. hieu ve cac truc ngan ((hang vi) or (hang va)) ca tren*.