Perhaps you should try some spelling variations:
phan thi » pham thi, tran thi, phan tu
phan tai » pham tai, nhan tai, han tai
ve chat » va chat, van chat
nang ma » tang ma, sang ma, nang cao
ve cham » va cham, vu cham, ve chim
su sac » su sach, su cac, su xac
xuc va » duc va, tuc va, luc va
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
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 sac ky nang ma hoi. hieu ((ve cham) or (ve chat)) xuc va ((phan tai) OR (phan thi)) va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang ma hoi. hieu ((ve cham) OR (ve chat)) xuc va ((phan tai) OR (phan thi)) va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang ma hoi. hieu ((ve cham) or (ve chat)) xuc va ((phan tai) OR (phan thi)) va thiet".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang ma hoi. hieu ((ve cham) or (ve chat)) xuc va ((phan tai) OR (phan thi)) va thiet*.