Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
thieu qua » hieu qua, thieu cua, thieu quang
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
thong dan » tuong dan, thong den, trong dan
thong van » trong van, thong va, thong quan
toan tap » 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 thieu qua - hanh ((trung cua) OR (trung cap)) cong ((thong dan) or (thong van)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu qua - hanh ((trung cua) OR (trung cap)) cong ((thong dan) OR (thong van)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu qua - hanh ((trung cua) OR (trung cap)) cong ((thong dan) or (thong van)) toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu qua - hanh ((trung cua) OR (trung cap)) cong ((thong dan) or (thong van)) toan tap*.