Perhaps you should try some spelling variations:
chat xuc » cam xuc, chao xu, chat cua
chat huu » pham huu
hieu van » hieu va, thien van, lieu va
te sach » toc sach
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
nang xa » nang x, lang xa, nang ma
sach 2 » sach y
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
2 nang » v nang

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 2 nang xa hoi. hieu van ((chat xuc) or (chat huu)) va dan vi ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach 2 nang xa hoi. hieu van ((chat xuc) OR (chat huu)) va dan vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach 2 nang xa hoi. hieu van ((chat xuc) or (chat huu)) va dan vi ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach 2 nang xa hoi. hieu van ((chat xuc) or (chat huu)) va dan vi ((cua tre) OR (cuu tre))*.