Perhaps you should try some spelling variations:
thien van » thi van
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
vu khao » va khao, vu kham, vu khac
su tien » su kien, su hien, tu tieng
van cac » van hac, van cau, van bac
ly hang » ly quang
ly nang » ky nang, ly vang, ly quang
cuu tre » cua tre, cau tren, cau treo
du va » dau va, tu va, su va

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khao ((ly nang) OR (ly hang)) xa hoi. thien van cac du va thanh vi ((su tien) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khao ((ly nang) OR (ly hang)) xa hoi. thien van cac du va thanh vi ((su tien) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khao ((ly nang) OR (ly hang)) xa hoi. thien van cac du va thanh vi ((su tien) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: vu khao ((ly nang) OR (ly hang)) xa hoi. thien van cac du va thanh vi ((su tien) or (cuu tre))*.