Perhaps you should try some spelling variations:
gian cua » gian xu, ban cua
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
van dan » van ban, ban dan, van dao
ve cham » va cham, ve chat, vu cham
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
lo van » le van, vo van, so van
va cua » va chua, via cua, ca 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 cham) or (va cac)) lo van dan ((va cua) or (gian cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu ((ve cham) OR (va cac)) lo van dan ((va cua) OR (gian cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ((ve cham) or (va cac)) lo van dan ((va cua) or (gian cua)) tre*.