Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
han tai » hang tai, nhan tai, van tai
nam tuc » nam truc, nam tu, nam thuoc
toc sac » toc sach, toc san, hoc sach
dang ha » dong ha, dung ha, lang ha
dang xa » dang xay, lang xa, dang va
sac ky » cac ky, sai ky
va han » va phan, van han, va hanh
cuc te » cua te, cuc thue, cuc tieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky ((dang xa) or (dang ha)) hoi. hieu van ((nam tuc) OR (nam thuc)) va han tai cuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky ((dang xa) OR (dang ha)) hoi. hieu van ((nam tuc) OR (nam thuc)) va han tai cuc te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky ((dang xa) or (dang ha)) hoi. hieu van ((nam tuc) OR (nam thuc)) va han tai cuc te".
• Adding a wildcard symbol may retrieve word variants: toc sac ky ((dang xa) or (dang ha)) hoi. hieu van ((nam tuc) OR (nam thuc)) va han tai cuc te*.