Perhaps you should try some spelling variations:
trinh vat » trinh van, trinh luat, sinh vat
cua viet » ca viet, hoa viet, cua vat
va trinh » van trinh, va tinh, lap trinh
xu quang » vu quang, xa quang, x quang
hieu va » lieu va, hieu qua
vat cua » mat cua, bat cua, dat cua
tu sach » thu sach, su sach, te sach
hieu ve » hieu van
tu lang » cu lang, tu lanh, xu lang
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((tu lang) or (xu quang)) xa hoi. ((hieu ve) or (hieu va)) cam xuc va trinh vat cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tu lang) OR (xu quang)) xa hoi. ((hieu ve) OR (hieu va)) cam xuc va trinh vat cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((tu lang) or (xu quang)) xa hoi. ((hieu ve) or (hieu va)) cam xuc va trinh vat cua viet*.