Perhaps you should try some spelling variations:
truong va » truong dai, truong cao, truong dao
su sach » so sach, vu sach
danh di » danh du, xanh di, danh dien
va danh » va dinh, va dan, va hanh
22 lang » 22 thang
va cam » va cham, va cac, va cao
ve cam » ve cham, ve cac, ve cai
2 lang » o lang, _ lang
di va » dai va, di vao, doi va
thiet » thieu

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 ((2 lang) or (22 lang)) xa hoi. hieu ((ve cam) OR (va cam)) truong va danh di va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((2 lang) OR (22 lang)) xa hoi. hieu ((ve cam) OR (va cam)) truong va danh di va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((2 lang) or (22 lang)) xa hoi. hieu ((ve cam) OR (va cam)) truong va danh di va thiet".
• Adding a wildcard symbol may retrieve word variants: su sach ((2 lang) or (22 lang)) xa hoi. hieu ((ve cam) OR (va cam)) truong va danh di va thiet*.