Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
lang cac » bang cac, hang cac, dang cac
cac khoi » cac thoi, cac khoan, cach thoi
nhan tai » hang tai, van tai, toan tai
tai cuu » tai cuc, tai buu, tai cua
duc van » duc va, duc tan, duc manh
xuc van » luc van, vuc van, xuc ban
cuu tre » cua tre, cau tren, cau treo
ve cham » va cham, ve chat, vu cham
y lang » o lang, _ lang, tay lang
ve cam » ve cac, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach y lang cac khoi. hieu ((ve cam) OR (ve cham)) ((xuc van) or (duc van)) nhan tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y lang cac khoi. hieu ((ve cam) OR (ve cham)) ((xuc van) OR (duc van)) nhan tai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach y lang cac khoi. hieu ((ve cam) OR (ve cham)) ((xuc van) or (duc van)) nhan tai cuu tre".
• Adding a wildcard symbol may retrieve word variants: hoc sach y lang cac khoi. hieu ((ve cam) OR (ve cham)) ((xuc van) or (duc van)) nhan tai cuu tre*.