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
trung cua » truong cua, trung tuan, trung cap
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
tung cua » tuong cua, dung cua, tang cua
toan ban » van 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 - thanh ((tung cua) OR (trung cua)) thong cong manh toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet tach - thanh ((tung cua) OR (trung cua)) thong cong manh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - thanh ((tung cua) OR (trung cua)) thong cong manh toan ban*.