Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thuc day » thuc dan, thuc vat
day than » day thanh, dan than, bay than
than cap » khan cap, thanh lap, thanh cac
hoc cac » hoc cao
nang xa » nang x, lang xa, nang ma
cho tre » cho thue, khoe tre
ve nam » he nam, va nam, te nam
le nam » ly nam, he nam, le na

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc cac) or (thuat sach)) ky nang xa hoi. hieu ((ve nam) or (le nam)) thuc day than cap cho tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc cac) OR (thuat sach)) ky nang xa hoi. hieu ((ve nam) OR (le nam)) thuc day than cap cho tre.
• Adding a wildcard symbol may retrieve word variants: ((hoc cac) or (thuat sach)) ky nang xa hoi. hieu ((ve nam) or (le nam)) thuc day than cap cho tre*.