Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
luc ban » duc ban, cuc ban, luc van
luc bat » suc bat, luc nhat, luat bat
hanh de » hanh ve, hanh kem
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
ve cam » ve cham, ve cac, va cam
de cua » le cua, te cua, dieu cua
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang o hoi. hieu ve cam ((luc ban) OR (luc bat)) hanh de cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang o hoi. hieu ve cam ((luc ban) OR (luc bat)) hanh de cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang o hoi. hieu ve cam ((luc ban) OR (luc bat)) hanh de cua tre*.