Perhaps you should try some spelling variations:
te sach » toc sach
va chat » van chat, va phat, cao chat
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach y, sach 2
dan vi » doan vi, don vi, dan va
v nang » va nang, vu nang, van nang
luc va » tuc va, loc va

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