Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
dang loai » dan loai, dang hoai, dang loi
thuc day » thuc vat
thuc dan » thuc hanh, hoc dan, thuc vat
loai ca » loai cay, loai cua, loai va
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve nam » he nam, va nam, le nam
ca tre » ca tren, cua tre, ca tru

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) or (tu sach)) ty nang xa hoi. hieu ve nam ((thuc dan) or (thuc day)) dang loai ca tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (tu sach)) ty nang xa hoi. hieu ve nam ((thuc dan) OR (thuc day)) dang loai ca tre.
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) or (tu sach)) ty nang xa hoi. hieu ve nam ((thuc dan) or (thuc day)) dang loai ca tre*.