Perhaps you should try some spelling variations:
tinh van » trinh van, dinh van, tinh va
cham doc » cham soc, chat doc, chau doc
van cua » vang cua, ban cua, dan cua
va tinh » may tinh
va cham » va chat, va tham
hieu va » lieu va, hieu qua
sach lo » sach dao, sach doi, sach hoi
doc va » duoc va, hoc va, duc va
cua cu » cua chu, cua cau, cua su
o hoi » co hoi, o hoc, o hoa
o hai » co hai, so hai, o lai

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 lo) or (sach y)) nang ((o hoi) OR (o hai)). hieu va cham doc va tinh van cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach lo) OR (sach y)) nang ((o hoi) OR (o hai)). hieu va cham doc va tinh van cua cu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach lo) or (sach y)) nang ((o hoi) OR (o hai)). hieu va cham doc va tinh van cua cu*".