Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
tu sach » thu sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
xa dinh » xac dinh, va dinh, ba dinh
dinh vi » dinh ve, dinh viet, dinh tri
ve cam » ve cham, ve cac, va cam
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (tu sach)) ky nang xa hoi. hieu ((ve cam) or (va cac)) tuc xa dinh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (tu sach)) ky nang xa hoi. hieu ((ve cam) OR (va cac)) tuc xa dinh vi su triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (tu sach)) ky nang xa hoi. hieu ((ve cam) or (va cac)) tuc xa dinh vi su triet*.