Perhaps you should try some spelling variations:
trong manh » trong minh, trong anh, trong mach
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
manh toan » thanh toan, anh tuan, tinh toan
dang duc » dang quoc, dao duc, dang su
toan tap » toan ban
tang du » nang du, hang dau, nang dua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sach - anh ((tang du) or (dang duc)) dung trong manh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - anh ((tang du) OR (dang duc)) dung trong manh toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - anh ((tang du) or (dang duc)) dung trong manh toan tap*.