Perhaps you should try some spelling variations:
dien cuc » dien tu, dieu cua, vien cac
dien cua » dieu cua, dien cu, tien cua
thuc va » thuc vat, thuc dan, thuc day
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
ve cham » va cham, ve chat, vu cham
va dan » ca dan, va dao, va dau
ve cam » ve cac, va cam, ve cai

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 ky nang xa hoi. hieu ((ve cam) or (ve cham)) thuc va dan ((dien cua) OR (dien cuc)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu ((ve cam) OR (ve cham)) thuc va dan ((dien cua) OR (dien cuc)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu ((ve cam) or (ve cham)) thuc va dan ((dien cua) OR (dien cuc)) viet".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu ((ve cam) or (ve cham)) thuc va dan ((dien cua) OR (dien cuc)) viet*.