Perhaps you should try some spelling variations:
te sach » toc sach
cac luc » cau luc, coc luc, cac nuoc
cua tre » cua te, cuu tre, cua triet
sach ly » sach y, sach lo, sach ty
luy tre » luyen tre
ly nang » ky nang, ly hang, ly vang
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
va don » va dong, va do, la don
x hoi » xa hoi, o hoi, x ho

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 ly nang x hoi. hieu ve cac luc ((va don) OR (va doc)) vi ((cua tre) or (luy tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang x hoi. hieu ve cac luc ((va don) OR (va doc)) vi ((cua tre) OR (luy tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly nang x hoi. hieu ve cac luc ((va don) OR (va doc)) vi ((cua tre) or (luy tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ly nang x hoi. hieu ve cac luc ((va don) OR (va doc)) vi ((cua tre) or (luy tre))*.