Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
thuc dan » thuc hanh, hoc dan, thuc vat
hanh tu » danh tu
te sach » toc sach
nang xa » nang x, lang xa, nang ma
cu thuc » cuu thuc, co thuc, cu thu
anh tu » anh tuan
van cu » van cau, van chu, van cua
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) or (te sach)) ky nang xa hoi. hieu van cu thuc dan ((hanh tu) OR (anh tu)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (te sach)) ky nang xa hoi. hieu van cu thuc dan ((hanh tu) OR (anh tu)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (te sach)) ky nang xa hoi. hieu van cu thuc dan ((hanh tu) OR (anh tu)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (te sach)) ky nang xa hoi. hieu van cu thuc dan ((hanh tu) OR (anh tu)) cua te*.