Perhaps you should try some spelling variations:
trinh vat » trinh van, trinh luat, sinh vat
trinh ve » trinh he, trinh vi, trinh viet
trinh va » trinh van, trinh vi, trinh han
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang xa hoi. hieu ve cac duc va ((trinh ve) or (((trinh va) OR (trinh vat)))) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ve cac duc va ((trinh ve) OR (((trinh va) OR (trinh vat)))) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. hieu ve cac duc va ((trinh ve) or (((trinh va) OR (trinh vat)))) cuu tre*".