Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
bac thuc » bao thuc, bac thua, cach thuc
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
van bac » van ban, van bao, van hac
thuc va » thuc vat, thuc dan, thuc day
thai xu » thai cua
y nang » ky nang, ly nang, v nang
va dau » va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang xa hoi. hieu van bac thuc va dau ((thai xu) or (tai cuc)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu van bac thuc va dau ((thai xu) OR (tai cuc)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu van bac thuc va dau ((thai xu) or (tai cuc)) tre*.