Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
thuc dan » thuc hanh, hoc dan, thuc vat
thi cong » tai cong, thien cong
cong cam » cong cau, cong cac, cong nam
vai cua » dai cua, hai cua, lai cua
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va

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 y nang xa hoi. thi cong cam ((xuc va) or (thuc dan)) hanh ((vai cuu) OR (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang xa hoi. thi cong cam ((xuc va) OR (thuc dan)) hanh ((vai cuu) OR (vai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang xa hoi. thi cong cam ((xuc va) or (thuc dan)) hanh ((vai cuu) OR (vai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. thi cong cam ((xuc va) or (thuc dan)) hanh ((vai cuu) OR (vai cua)) tre*.