Perhaps you should try some spelling variations:
tran tuan » tran xuan, tran quang, tran thanh
duc tran » duc tan, duc toan, duc tren
te sach » toc sach
ve pham » vi pham, v pham, ve phan
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
hieu ve » hieu va, hieu van
sach lo » sach dao, sach doi, sach hoi
lo nang » ho nang, ly nang, loai nang
ma hoi » mai hoi, xa hoi, 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 lo nang ((ma hoi) or (ma hoa)). hieu ve pham duc tran tuan ((vai cua) or (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach lo nang ((ma hoi) OR (ma hoa)). hieu ve pham duc tran tuan ((vai cua) OR (lai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach lo nang ((ma hoi) or (ma hoa)). hieu ve pham duc tran tuan ((vai cua) or (lai cua)) tre*.