Perhaps you should try some spelling variations:
trinh khong » tinh khong, trinh khung, thinh khong
sach nganh » sach ngan, sach tranh, cac nganh
nganh cong » nhanh chong, thanh cong
thuoc sach » hoc sach, nuoc sach, thuat sach
khong khi » khong he
thu sach » tu sach, thuat sach, thu hoach
te sach » toc sach
cong ha » cong hoa, dong ha, cong tac

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 nganh cong ha đong luc ) or ( ((thu sach) or (thuoc sach)) trinh khong khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach nganh cong ha đong luc ) OR ( ((thu sach) OR (thuoc sach)) trinh khong khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( te sach nganh cong ha đong luc ) or ( ((thu sach) or (thuoc sach)) trinh khong khi đong luc ))*.