Perhaps you should try some spelling variations:
van cham » van chat, va cham, van pham
van tham » van thanh, van tuan, van chat
han thai » han tai, ban thai, van thai
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
thai va » thai van
tuc va » thuc va, truc va, tuc xa
va han » va phan, van han, va hanh
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang xa hoi. thien ((van cham) or (van tham)) tuc va han thai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. thien ((van cham) OR (van tham)) tuc va han thai va thiet.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. thien ((van cham) or (van tham)) tuc va han thai va thiet*.