Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
day cua » dai cua
dat cua » dai cua, mat cua, dan cua
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
ve cac » va cac, vien cac
ma hoi » mai hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang ((ma hoi) or (xa hoi)). hieu ve cac duc va thanh ((dat cua) OR (day cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((ma hoi) OR (xa hoi)). hieu ve cac duc va thanh ((dat cua) OR (day cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((ma hoi) or (xa hoi)). hieu ve cac duc va thanh ((dat cua) OR (day cua)) tre*".