Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc anh
nay lang » nam lang, tay lang, nhan lang
minh hai » minh khai, tinh hai, manh hai
va triet » va thiet, va trien, ve triet
lang xa » lang ha, dang xay, lang van
hoc cac » hoc cao
va minh » van minh, vua minh, va kinh
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
hai va » hai van, thai va, hoi va
ve cai » va cai, ve cac, ve tai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) OR (hoc cac)) nay lang xa hoi. hieu ((ve cai) or (va cam)) xuc va minh hai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc cac)) nay lang xa hoi. hieu ((ve cai) OR (va cam)) xuc va minh hai va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc cac)) nay lang xa hoi. hieu ((ve cai) or (va cam)) xuc va minh hai va triet".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) OR (hoc cac)) nay lang xa hoi. hieu ((ve cai) or (va cam)) xuc va minh hai va triet*.