Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
thieu hach » thien hach, chieu sach, hieu cach
phuong dan » phuong danh, phuong doan, huong dan
hoc thieu » toc thieu, hoc hien
trang va » tran van, hang va
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
bang va » hang va, ban va, dang van

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