Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, lieu va
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
van dau » van dao, phan dau
dau luc » cau luc, dau luan, dau nuoc
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
cua tu » cua tuc, cua su, cua cu

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 y nang mai hoi. hieu van dau luc ((va hanh) or (may tinh)) di ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang mai hoi. hieu van dau luc ((va hanh) OR (may tinh)) di ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: te sach y nang mai hoi. hieu van dau luc ((va hanh) or (may tinh)) di ((cua te) or (cua tu))*.