Perhaps you should try some spelling variations:
nhan luc » nang luc
nang mai » nang ma, nang tai, lang mai
nhan loc » nhan hoc, nhan loai, nhan cuoc
hanh doi » thanh doi, hanh noi, hang doi
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang mai hoi. hieu qua ((nhan loc) OR (nhan luc)) va hanh doi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang mai hoi. hieu qua ((nhan loc) OR (nhan luc)) va hanh doi ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang mai hoi. hieu qua ((nhan loc) OR (nhan luc)) va hanh doi ((cua tre) or (cuu tre))*".