Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
trinh van » trinh han, trinh quan, trinh toan
cong dan » cong san, cong tan, huong dan
toan cao » toan ban
toan tap » toan ban
tinh va » tich va, trinh vat, tinh gia

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 - nhanh ((tinh va) or (trinh van)) nhung cong dan ((toan cao) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - nhanh ((tinh va) OR (trinh van)) nhung cong dan ((toan cao) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - nhanh ((tinh va) or (trinh van)) nhung cong dan ((toan cao) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - nhanh ((tinh va) or (trinh van)) nhung cong dan ((toan cao) OR (toan tap))*.