Perhaps you should try some spelling variations:
nhan tai » hang tai, van tai, toan tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
xuc va » duc va, tuc va, xac va
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa

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 ky nang ma hoi. hieu ve cam ((xuc va) or (luc va)) ((nhan tai) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. hieu ve cam ((xuc va) OR (luc va)) ((nhan tai) OR (hanh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoi. hieu ve cam ((xuc va) or (luc va)) ((nhan tai) or (hanh va)) cua tre*.