Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
co sach » bo sach, cuon sach, hoc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
thuc va » thuc vat, thuc dan, thuc day
tinh ve » trinh ve, tinh ven, dinh ve
va cam » va cham, va cac, va cao
tuc va » truc va, tuc xa, duc va
ve su » va su

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ky nang xa hoi. lieu va cam ((tuc va) OR (thuc va)) tinh ve su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ky nang xa hoi. lieu va cam ((tuc va) OR (thuc va)) tinh ve su triet".
• Adding a wildcard symbol may retrieve word variants: co sach ky nang xa hoi. lieu va cam ((tuc va) OR (thuc va)) tinh ve su triet*.