Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
va thanh » gia thanh, ban thanh, va tinh
va hanh » van hanh, va danh, ban hanh
hieu ve » hieu va, hieu van
cau loc » hau loc, cau hoc, cau luc
cua tre » cua te, cuu tre, cua triet
ve cau » ke cau, va cau, ve cac
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
vi cua » vai cua, di cua
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: thuat sach ((y nang) OR (v nang)) x hoi. hieu ve cau loc ((va hanh) or (va thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((y nang) OR (v nang)) x hoi. hieu ve cau loc ((va hanh) OR (va thanh)) vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ((y nang) OR (v nang)) x hoi. hieu ve cau loc ((va hanh) or (va thanh)) vi cua tre*".