Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
thong cong » trong cong, tong cong, thong thong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tranh cua » doanh cua
manh cua » doanh cua, ban cua
cong tan » cong tac, cong san, cong thanh
toan tai » toan tap, doanh tai, toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet tach - canh ((tranh cua) or (manh cua)) thong cong tan ((toan tai) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - canh ((tranh cua) OR (manh cua)) thong cong tan ((toan tai) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - canh ((tranh cua) or (manh cua)) thong cong tan ((toan tai) or (van ban))*.