Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
thu sach » tu sach, thuat sach, thu hoach
cham tuc » nham thuc, pham thuc, tham thuc
hoc sach » hoc sinh, hoc cac, hoc anh
va hanh » van hanh, va thanh, va danh
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (((thuoc sach) OR (hoc sach)))) ky lang xa hoi. hieu vu cham tuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (((thuoc sach) OR (hoc sach)))) ky lang xa hoi. hieu vu cham tuc va hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (((thuoc sach) OR (hoc sach)))) ky lang xa hoi. hieu vu cham tuc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (((thuoc sach) OR (hoc sach)))) ky lang xa hoi. hieu vu cham tuc va hanh vi cua tre*.