Perhaps you should try some spelling variations:
lmay nang » luan nang, may nong, day nang
nhan luc » nang luc
hieu van » hieu va, thien van, lieu va
van nhan » van phan, van thanh, danh nhan
may nang » may nong, ky nang, cam nang
va hanh » van hanh, va thanh, va danh
hoi cua » hoi chuc
tu sach » thu sach, su sach, te sach
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((may nang) or (lmay nang)) xa hoi. hieu van nhan luc va hanh ((di cua) or (hoi cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((may nang) OR (lmay nang)) xa hoi. hieu van nhan luc va hanh ((di cua) OR (hoi cua)) triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((may nang) or (lmay nang)) xa hoi. hieu van nhan luc va hanh ((di cua) or (hoi cua)) triet*.