Perhaps you should try some spelling variations:
thien van » thi van
thuc dan » thuc hanh, hoc dan, thuc vat
cau thuc » cau truc, cuu thuc, can thuc
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
sach ky » sach y, sach ty, sach kem
hanh te » hanh tu, hanh de, hanh he
hanh ve » hanh vi, hanh va, hanh kem
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ky) or (sac ky)) nang xa hoi. thien van cau thuc dan ((hanh te) OR (hanh ve)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sac ky)) nang xa hoi. thien van cau thuc dan ((hanh te) OR (hanh ve)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) or (sac ky)) nang xa hoi. thien van cau thuc dan ((hanh te) OR (hanh ve)) cua te".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sac ky)) nang xa hoi. thien van cau thuc dan ((hanh te) OR (hanh ve)) cua te*.