Perhaps you should try some spelling variations:
su sach » so sach, vu sach
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
cam loc » cam lo
hieu va » lieu va, hieu qua
cuu tre » cau tren, cau treo
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
ma hoi » mai hoi, xa hoi, ma hoa
loc va » hoc va, luc va
va cam » va cham, va cac, va cao

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) or (thu hoach)) ky sang ma hoi. hieu va cam loc va hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu hoach)) ky sang ma hoi. hieu va cam loc va hanh vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu hoach)) ky sang ma hoi. hieu va cam loc va hanh vi ((cua tre) or (cuu tre))*.