Perhaps you should try some spelling variations:
thuoc theo » thuoc tren, thuoc ho, chuc theo
hai thuoc » hai huoc, bai thuoc, hanh thuoc
manh hai » lanh hai, minh hai, thanh hai
thuoc ma » hoc ma, duoc ma
ma manh » mai manh, ha manh, van manh
su sach » so sach, vu sach
cao hoi » cau hoi, co hoi, cao hoc
ly nang » ky nang, ly hang, ly vang
y nang » ky nang, v nang, may nang
va nay » va ngay, va cay
va nam » van nam, ha nam

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) or (ly nang)) cao hoi. hieu ((va nam) or (va nay)) thuoc ma manh hai thuoc theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ly nang)) cao hoi. hieu ((va nam) OR (va nay)) thuoc ma manh hai thuoc theo.
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (ly nang)) cao hoi. hieu ((va nam) or (va nay)) thuoc ma manh hai thuoc theo*.