Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
te sach » toc sach
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
qua cam » qua cham, qua cac, qua ca
hanh de » hanh ve, hanh kem
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
de va » de van, te va, ke va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ky lang) OR (ky dang)) xa hoi. hieu qua cam ((xuc va) or (luc va)) hanh de va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky dang)) xa hoi. hieu qua cam ((xuc va) OR (luc va)) hanh de va trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) OR (ky dang)) xa hoi. hieu qua cam ((xuc va) or (luc va)) hanh de va trien".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) OR (ky dang)) xa hoi. hieu qua cam ((xuc va) or (luc va)) hanh de va trien*.