Perhaps you should try some spelling variations:
chien bach » vien bach, thien hach, chiet tach
chien dich » phien dich, mien dich, trien dich
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
huu tre » huu tri, cuu tre, huu them
xac va » tac va, ac va, bac va
va huu » vu huu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty nang xa hoi. chieu ((chien bach) OR (chien dich)) ((xac va) or (duc va)) hang va huu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. chieu ((chien bach) OR (chien dich)) ((xac va) OR (duc va)) hang va huu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. chieu ((chien bach) OR (chien dich)) ((xac va) or (duc va)) hang va huu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. chieu ((chien bach) OR (chien dich)) ((xac va) or (duc va)) hang va huu tre*.