Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
phuong van » phung van, phong van, phuong lan
dieu sach » dien sach, chieu sach, dieu hanh
trung vap » trung cap, trung va, trung lap
trung van » truong van, trong van, trung va
hoc dieu » hoc thieu, hoc hien
than cap » khan cap, thanh lap, thanh cac
khan ap » khan cap, han ap, khan dam

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc dieu sach - hanh ((trung vap) or (trung van)) nhung phuong van ((than cap) or (khan ap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu sach - hanh ((trung vap) OR (trung van)) nhung phuong van ((than cap) OR (khan ap)).
• Adding a wildcard symbol may retrieve word variants: hoc dieu sach - hanh ((trung vap) or (trung van)) nhung phuong van ((than cap) or (khan ap))*.