Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
lang van » dang van, tang van, hoang van
cac quoc » cac nuoc, cac cuoc, cao quoc
te sach » toc sach
co benh » con benh, so benh, o benh
quoc co » quoc cao, quoc cho, duoc co
van cac » van hac, van cau, van bac
lang xa » lang ha, dang xay
ve cua » le cua, te cua, ve cum
de cua » le cua, te cua, dieu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((lang xa) or (lang van)) hoi. hieu van cac quoc co benh ((ve cua) OR (de cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((lang xa) OR (lang van)) hoi. hieu van cac quoc co benh ((ve cua) OR (de cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((lang xa) or (lang van)) hoi. hieu van cac quoc co benh ((ve cua) OR (de cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach y ((lang xa) or (lang van)) hoi. hieu van cac quoc co benh ((ve cua) OR (de cua)) tre*.