Perhaps you should try some spelling variations:
truong ham » truong dai, truong cao, truong dao
ham hanh » pham hanh, pham thanh, pham khanh
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
vai va » mai va, dai va, hai va
vi va » vi van, vu va, bi va

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 y nang ((mai hoi) or (xa hoi)). hieu ve cac truong ham hanh ((vi va) OR (vai va)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((mai hoi) OR (xa hoi)). hieu ve cac truong ham hanh ((vi va) OR (vai va)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ((mai hoi) or (xa hoi)). hieu ve cac truong ham hanh ((vi va) OR (vai va)) triet*".