Perhaps you should try some spelling variations:
va trinh » van trinh, va tinh, lap trinh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
ve cac » va cac, vien cac
ve cua » de cua, te cua, ve cum
le cua » ly 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 ty nang xa hoi. hieu ve cac duc va trinh ((ve cua) OR (le cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu ve cac duc va trinh ((ve cua) OR (le cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ve cac duc va trinh ((ve cua) OR (le cua)) tre*.