Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh va » thanh van, thanh ha, thanh ve
tu sach » thu sach, su sach, te sach
cam duc » cam xuc, cao duc, pham duc
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ve cam » ve cham, ve cac, va cam

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

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