Perhaps you should try some spelling variations:
ty quang » tay quang, ly quang, tu quang
te sach » toc sach
va doan » va doanh, van doan, va dan
lua tre » cua tre, dua tren, luat tri
doan vi » doan va, don vi, doan thi
luy tre » luyen tre
sach ty » sach y, sach tu, sach thu
cac xuc » cac nuoc, chat xuc, cac cuoc
hieu va » lieu va, hieu qua

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 ty quang _ hoi. hieu va ((cac xuc) OR (cam xuc)) va doan vi ((lua tre) or (luy tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty quang _ hoi. hieu va ((cac xuc) OR (cam xuc)) va doan vi ((lua tre) OR (luy tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty quang _ hoi. hieu va ((cac xuc) OR (cam xuc)) va doan vi ((lua tre) or (luy tre))*".