Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cac truc » cau truc, cac tru, cac trung
thai cuu » thai cua, thi cuc, thai xu
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
truc va » thuc va, thuc vat, trung va
va dan » ca dan, va dao, va dau

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 ty nang xa hoi. hieu van cac truc va dan ((thai cuu) or (tai cuc)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu van cac truc va dan ((thai cuu) OR (tai cuc)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu van cac truc va dan ((thai cuu) or (tai cuc)) tre*.