Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cham cuu » cap cuu, chat cua
tinh hai » tinh thai, tinh chat, trinh han
tinh bai » tinh bac, hinh bai, tinh bao
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cuu va » cuu van, cuu ve
ca tre » ca tren, cua tre, va tre
tru » truc

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 ky nang xa hoi. hieu ve cham cuu va ((tinh bai) or (tinh hai)) ((ca tre) or (ca tru))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky nang xa hoi. hieu ve cham cuu va ((tinh bai) OR (tinh hai)) ((ca tre) OR (ca tru)).
• Adding a wildcard symbol may retrieve word variants: hoc sach ky nang xa hoi. hieu ve cham cuu va ((tinh bai) or (tinh hai)) ((ca tre) or (ca tru))*.