Perhaps you should try some spelling variations:
thuat tach » thuat sach, thuat mach, thuat tac
trong quan » thong quan, tong quan, thong quang
trang tuan » tran tuan, trung tuan, trong tuan
hoc thuat » hoc thuyet, hoc thuc, hoc chat
cong vang » cong lang, cong quang, cong ngang
vang ty » van ty, nang ty, bang tay

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thuat tach - hanh ((trong quan) or (trang tuan)) trong cong vang ty co~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thuat tach - hanh ((trong quan) OR (trang tuan)) trong cong vang ty co.
• Adding a wildcard symbol may retrieve word variants: hoc thuat tach - hanh ((trong quan) or (trang tuan)) trong cong vang ty co*.