Perhaps you should try some spelling variations:
dinh thi » dinh tri
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
va dinh » van dinh, va kinh, va tinh
thi cuc » tai cuc
cuc tre » duc tre, cua tre, cuu tre
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa

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 (su sach))) or (thu hoach)) ky nang xa hoi. hieu ve cam tuc va dinh thi cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (su sach))) OR (thu hoach)) ky nang xa hoi. hieu ve cam tuc va dinh thi cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((tu sach) OR (su sach))) or (thu hoach)) ky nang xa hoi. hieu ve cam tuc va dinh thi cuc tre".
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) OR (su sach))) or (thu hoach)) ky nang xa hoi. hieu ve cam tuc va dinh thi cuc tre*.