Perhaps you should try some spelling variations:
nhan thai » nhanh thai, nhan tai, nhan tham
sach ty » sach tu, sach thu, xach tay
va nhan » van nhan, ca nhan, va phan
truc va » thuc va, thuc vat, trung va
va cham » va chat, va tham
ve cham » ve chat, vu cham, ve chim
nang ma » tang ma, sang ma, nang cao
thai va » thai van
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: so ((sach ty) or (sach y)) nang ma hoi. hieu ((ve cham) or (va cham)) truc va nhan thai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ty) OR (sach y)) nang ma hoi. hieu ((ve cham) OR (va cham)) truc va nhan thai va thiet.
• Adding a wildcard symbol may retrieve word variants: so ((sach ty) or (sach y)) nang ma hoi. hieu ((ve cham) or (va cham)) truc va nhan thai va thiet*.