Perhaps you should try some spelling variations:
thi hanh » thi thanh
thi hang » thi nang, thi hong, thi thanh
hieu cao » chieu cao, hieu cac, hieu ca
chat luc » chat xuc, chat lua, nhan luc
van hanh » van thanh, ban hanh, van anh
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
ty hang » ly hang, ty xang, thu hang
luc van » luoc van, luu van, duc van
kem va » kiem va, kiem van

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 ((ty hang) or (((thi hang) OR (thi hanh)))) xa hoi. hieu cao chat luc van hanh kem va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty hang) OR (((thi hang) OR (thi hanh)))) xa hoi. hieu cao chat luc van hanh kem va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty hang) or (((thi hang) OR (thi hanh)))) xa hoi. hieu cao chat luc van hanh kem va triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty hang) or (((thi hang) OR (thi hanh)))) xa hoi. hieu cao chat luc van hanh kem va triet*.