Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
sach ky » sac ky, sach y, sach ty
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
ve cai » va cai, ve tai, ve cau
tuc va » thuc va, tuc xa, duc va
vi cua » vai cua, di cua
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky tang xa hoi. hieu ((ve cai) or (ve cac)) ((tuc va) OR (truc va)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky tang xa hoi. hieu ((ve cai) OR (ve cac)) ((tuc va) OR (truc va)) hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky tang xa hoi. hieu ((ve cai) or (ve cac)) ((tuc va) OR (truc va)) hanh vi cua tre*".