Perhaps you should try some spelling variations:
vien cam » vien cac, vien nam, vien can
vien cao » vien cac, vien dai, vien da
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
va hang » van hang, va nang, va lang
hang di » hang doi, hang vi, hang dien
cua tuc » cua duc, cua tu, cua thuoc
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de cua

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 y nang xa hoi. hieu ((vien cam) or (vien cao)) xuc va hang di cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ((vien cam) OR (vien cao)) xuc va hang di cua tuc.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ((vien cam) or (vien cao)) xuc va hang di cua tuc*.