Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
kinh vi » dinh vi, kinh ve, kenh vi
cuu tre » cua tre, cau tren, cau treo
ve cac » va cac, vien cac
xuc va » tuc va, luc va, xac va
vi cuu » vi luu, vinh cuu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (thuat lanh)) ky nang x hoi. hieu ve cac ((xuc va) OR (duc va)) kinh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thuat lanh)) ky nang x hoi. hieu ve cac ((xuc va) OR (duc va)) kinh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (thuat lanh)) ky nang x hoi. hieu ve cac ((xuc va) OR (duc va)) kinh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thuat lanh)) ky nang x hoi. hieu ve cac ((xuc va) OR (duc va)) kinh vi cuu tre*.