Perhaps you should try some spelling variations:
cam truong » cac truong, lam truong, cao truong
cua triet » cua viet, su triet, va triet
truong va » truong dai, truong cao, truong dao
va thieu » va thiet, va hieu, va tieu
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
va tinh » may tinh
tinh ve » trinh ve, tinh ven, dinh ve
co sach » bo sach, cuon sach, hoc sach
vu sach » vu bach, su sach, vu khach
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam
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: ((vu sach) or (co sach)) y nang ma hoi. hieu ve cam truong va tinh ve ((cua triet) or (va thieu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (co sach)) y nang ma hoi. hieu ve cam truong va tinh ve ((cua triet) OR (va thieu)).
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (co sach)) y nang ma hoi. hieu ve cam truong va tinh ve ((cua triet) or (va thieu))*.