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