Perhaps you should try some spelling variations:
hoc thuc » hoc huu
su sach » vu sach
so sach » so sanh, bo sach, co sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va tinh » may tinh
tinh va » tich va, trinh van, trinh vat
va hoc » van hoc
va chu » va che, va cau, va chi
chu te » chu de, chu tu

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 (so sach)) ky lang xa hoi. hieu va hoc thuc va tinh va chu te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky lang xa hoi. hieu va hoc thuc va tinh va chu te.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky lang xa hoi. hieu va hoc thuc va tinh va chu te*.