Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
manh hai » lanh hai, minh hai, thanh hai
danh hai » dang hai, lanh hai, danh hau
sach tu » sach thu, cach tu, sach ty
cao suc » cao su, cao duc
qua cao » qua cac, qua ca, qua cai
nang xa » lang xa, nang ma, mang xa
suc va » duc va, tuc va, luc va
cua te » cua tu

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 tu ((nang xa) or (nang x)) hoi. hieu qua cao suc va ((danh hai) OR (manh hai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach tu ((nang xa) OR (nang x)) hoi. hieu qua cao suc va ((danh hai) OR (manh hai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach tu ((nang xa) or (nang x)) hoi. hieu qua cao suc va ((danh hai) OR (manh hai)) cua te".
• Adding a wildcard symbol may retrieve word variants: hoc sach tu ((nang xa) or (nang x)) hoi. hieu qua cao suc va ((danh hai) OR (manh hai)) cua te*.