Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
van thanh » ban thanh, van tuan
ly quang » le quang, vu quang
thi hang » thi hanh, thi nang, thi hong
su sach » so sach, vu sach
vuc van » duc van, luc van, thuc van
cu tren » tu tren, dua tren
va cao » va cac, va co, va dao
vai cu » vai cua, van cu
va cam » va cham, va cac, va cai

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 ((ly quang) or (thi hang)) xa hoi. hieu ((va cam) OR (va cao)) vuc van thanh vai cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ly quang) OR (thi hang)) xa hoi. hieu ((va cam) OR (va cao)) vuc van thanh vai cu tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ly quang) or (thi hang)) xa hoi. hieu ((va cam) OR (va cao)) vuc van thanh vai cu tren*".