Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, lieu va
danh hai » dang hai, lanh hai, manh hai
tu cach » tu cac
so sach » so sanh, bo sach, co sach
mai hoi » mai khoi, dai hoi, lai hoi
ba truc » cau truc, ba trung, dai truc
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
hai cua » thai cua, dai cua, hoi cua
van ba » van ban, van bao, van bac
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (so sach)) ky nang mai hoi. hieu van ba truc va danh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (so sach)) ky nang mai hoi. hieu van ba truc va danh hai cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (so sach)) ky nang mai hoi. hieu van ba truc va danh hai cua te*.