Perhaps you should try some spelling variations:
trinh vat » trinh van, trinh luat, sinh vat
va trinh » van trinh, va tinh, lap trinh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
long ha » dong ha, cong ha, dong hoa
nam luc » nang luc, nhan luc, nam thuc
vat cau » dat cau, va cau, van cau
cau tre » cau tren, cau treo, cau tra
va nam » van nam, ha nam, va nay
luc va » duc va, tuc va, loc va

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 ky ((lang xa) or (long ha)) hoi. lieu va nam luc va trinh vat cau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((lang xa) OR (long ha)) hoi. lieu va nam luc va trinh vat cau tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((lang xa) or (long ha)) hoi. lieu va nam luc va trinh vat cau tre*.