Perhaps you should try some spelling variations:
bao truc » bao thuc, ba truc, vao truc
manh hai » lanh hai, minh hai, thanh hai
danh hai » dang hai, lanh hai, danh hau
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, lieu va
tu cach » tu cac
truc va » thuc va, thuc vat, trung va
van bao » van ban, van dao
mai hoi » mai khoi, dai hoi, lai hoi
so sach » so sanh, bo sach, co sach
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 bao truc va ((danh hai) OR (manh 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 bao truc va ((danh hai) OR (manh hai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (so sach)) ky nang mai hoi. hieu van bao truc va ((danh hai) OR (manh hai)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (so sach)) ky nang mai hoi. hieu van bao truc va ((danh hai) OR (manh hai)) cua te*.