Perhaps you should try some spelling variations:
phan tai » pham tai, nhan tai, phan thi
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
va phan » van phan, va phat, va phap
va cham » va chat, va tham
ve chat » va chat, van chat
ve cham » vu cham, ve chim, viet cham
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
luc va » duc va, tuc va, loc va
tai va » thai va, mai va, tri va
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: su sach ty nang xa hoi. hieu ((((ve cham) OR (ve chat))) or (va cham)) luc va phan tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ((((ve cham) OR (ve chat))) OR (va cham)) luc va phan tai va thiet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. hieu ((((ve cham) OR (ve chat))) or (va cham)) luc va phan tai va thiet*".