Perhaps you should try some spelling variations:
viet cua » viec cua, viet ca, viet qua
sach thu » sach thue, sach thieu, sach tham
va tinh » may tinh
xang xa » lang xa, mang xa, ang xa
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, xach tay
cac duc » cac du, cao duc, cac dac
va dinh » van dinh, va kinh, vu dinh
ve cac » va cac, vien cac
cua te » cua tu

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) or (sach thu)) xang xa hoi. hieu ve cac duc ((va dinh) OR (va tinh)) viet cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) xang xa hoi. hieu ve cac duc ((va dinh) OR (va tinh)) viet cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach thu)) xang xa hoi. hieu ve cac duc ((va dinh) OR (va tinh)) viet cua te*".