Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
day thanh » dao thanh, dat thanh, da thanh
nam thuc » nam thuoc, am thuc, nam thu
thuc day » thuc dan, thuc vat
hoc cac » hoc cao
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
tap cho » tap co, tap chi, tap tho
ve nam » he nam, va nam, le nam

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 thuc day thanh ((tap cho) OR (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 thuc day thanh ((tap cho) OR (cap cho)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc cac) or (thuat sach)) ky nang xa hoi. hieu ve nam thuc day thanh ((tap cho) OR (cap cho)) tre".
• Adding a wildcard symbol may retrieve word variants: ((hoc cac) or (thuat sach)) ky nang xa hoi. hieu ve nam thuc day thanh ((tap cho) OR (cap cho)) tre*.