Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dan hanh » dang hanh, dan khanh, dan thanh
phan dau » phan tu, hang dau
thuc dan » thuc hanh, hoc dan, thuc vat
ty nang » ty xang, ty hang, ly nang
van dau » van dao
hanh te » hanh tu, hanh ve, hanh de
te cua » tue cua, le cua, de cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ty nang) OR (ky nang)) xa hoi. hieu ((van dau) or (phan dau)) thuc dan hanh te cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty nang) OR (ky nang)) xa hoi. hieu ((van dau) OR (phan dau)) thuc dan hanh te cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ty nang) OR (ky nang)) xa hoi. hieu ((van dau) or (phan dau)) thuc dan hanh te cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) OR (ky nang)) xa hoi. hieu ((van dau) or (phan dau)) thuc dan hanh te cua te*.