Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
vanh dai » van dai, vanh tai, lanh dao
truc va » thuc va, thuc vat, trung va
tu sach » thu sach, su sach, tu cach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
te sach » toc sach
ve cham » va cham, ve chat, vu cham
tuc va » thuc va, tuc xa, duc va

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) or (te sach)) ky nang xa hoi. hieu ve cham ((tuc va) OR (truc va)) vanh dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang xa hoi. hieu ve cham ((tuc va) OR (truc va)) vanh dai cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky nang xa hoi. hieu ve cham ((tuc va) OR (truc va)) vanh dai cua viet*".